3520-21 Importation of Engines, Vehicles, and Equipment Subject

Form Approved OMB 2060-0717 Approval Expires June 30, 2023

United States Environmental Protection Agency Engine Declaration Form
Importation of Engines, Vehicles, and Equipment Subject to Federal Air Pollution Regulations
U.S. EPA, Compliance Division, 2000 Traverwood Dr., Ann Arbor, Michigan 48105. (734) 214-4100; imports@epa.gov; www.epa.gov/otaq/imports/

This form must be submitted to the U.S. Customs and Border Protection (Customs) by the importer for each imported stationary, nonroad or heavyduty highway engine, including engines incorporated into vehicles or equipment, but not for new products covered by an EPA certificate of conformity,
bearing an EPA emission control label, if the original manufacturer is the importer. Note that references in this form to engines generally include vehicles
or equipment if they are subject to equipment-based standards. One form per engine or group of engines in a shipment may be used, with attachments
including all information required to fully describe each engine as below. This form must be retained for five years from the date of entry (19 CFR 163.4).
Additional requirements may apply in California. NOTE: While certain imports require specific written authorization from EPA, CBP may request EPA
review of importer documentation and eligibility for any import using this form. For light-duty motor vehicles, highway motorcycles, and the corresponding engines, use form 3520-1. This form does not apply to aircraft engines.
Identify the type of highway, nonroad, or stationary engine, vehicle, or equipment you are importing from the following list of products:
o A. Heavy-duty highway engines (for use in motor vehicles with gross vehicle weight rating above 8500 pounds). See 40 CFR parts 85, 86, and 1036.
o B. Locomotives or locomotive engines. See 40 CFR parts 1033 and 1068.
o C. Marine compression-ignition engines. See 40 CFR parts 1042 and 1068. This includes propulsion engines and auxiliary engines installed on
marine vessels.
o D. Other nonroad compression-ignition engines. See 40 CFR parts 1039 and 1068.
o E. Marine spark-ignition engines. See 40 CFR parts 1045 and 1068.
o F. Recreational engines and vehicles, including snowmobiles, off-highway motorcycles, all-terrain vehicles, and offroad utility vehicles that are subject
to the same emission standards as all-terrain vehicles. See 40 CFR parts 1051 and 1068.
o G. Other nonroad spark-ignition engines at or below 19 kW (or at or below 30 kW if total displacement is at or below 1000 cc). See 40 CFR parts
1054 and 1068.
o H. Other nonroad spark-ignition engines above 19 kW. See 40 CFR parts 1048 and 1068.
o I. Stationary compression-ignition engines. See 40 CFR part 60, subpart IIII.
o J. Stationary spark-ignition engines. See 40 CFR part 60, subpart JJJJ.
Check one of the following Codes to indicate the provision under which you are importing the engine, vehicle, or equipment:
o 1. U.S. certified engine or engine installed in a certified vehicle, covered by a valid EPA certificate of conformity and bearing an EPA emission
control label in English. Additional information for Category G engines from 2010 and later model years (see 40 CFR 90.1007 or 1054.690):
Exempt from bond?___. If not exempt, NAIC # for bond issuer:_____, policy number:____________, state of issue:__.
Permanent Exemptions for Nonconforming Engines
o 2. National security. Importing a labeled (where applicable) engine subject to 40 CFR 1068.315(a). For certain types of tactical equipment, this
exemption may require prior EPA approval.
o 3. Manufacturer-owned engine. Importing a labeled engine by an engine manufacturer holding a current U.S. EPA certificate of conformity, subject
to 40 CFR 1068.315(b).
o 4. Replacement engine. Importing a labeled engine by an engine manufacturer holding a current U.S. EPA certificate of conformity subject to
40 CFR 1068.315(c). This exemption does not apply to locomotive engines.
o 5. Extraordinary circumstances/hardship. Importing a labeled engine subject to 40 CFR 1068.315(d). An EPA letter of approval must be attached.
o 6. Hardship for small-volume manufacturers. Importing a labeled engine subject to 40 CFR 1068.315(e). An EPA letter of approval must be attached to this form.
o 7. Equipment-manufacturer hardship. Importing a labeled engine subject to 40 CFR 1068.315(f). This may also apply to secondary engine manufacturers. An EPA letter of approval must be attached to this form.
o 8. Identical configuration. Importing an engine subject to 40 CFR 1068.315(h). Such an engine must be identical in all material respects to a U.S.certified version, and the importer must have owned it for at least six months before importation. An EPA letter of approval must be attached to this form.
This exemption does not apply to locomotives.
o 9. Ancient engine. Importing an engine first manufactured at least 21 years earlier that is still in its original configuration, subject to 40 CFR
1068.315(i). This exemption does not apply to locomotives.
Temporary Exemptions for Nonconforming Engines
The following temporary exemptions apply for importing nonconforming engines. For companies that are not certificate holders for the
sectors identified above (A-J), EPA requests bonding with the U.S. Customs and Border Protection for the full value of the imported products
to make sure you comply with applicable requirements.
o 10. Repairs or alterations. Importing an engine for repair or alteration subject to 40 CFR 1068.325(a) or 85.1511(b)(1). An EPA letter of approval
must be attached.
o 11. Testing. Importing an engine for testing subject to 40 CFR 1068.325(b) or 85.1511(b)(2). Appropriate labeling is required for some engines and
recommended for all engines. An EPA letter of approval must be attached.
o 12. Display. Importing an engine for display subject to 40 CFR 1068.325(c) or 85.1511(b)(4). Appropriate labeling is required for some engines and
recommended for all engines. An EPA letter of approval must be attached.
o 13. Export. Importing an engine for eventual export, subject to 40 CFR 1068.325(d). NOTE: The engine and/or shipping container must be labeled or
tagged to identify them as solely for export.
o 14. Diplomatic or military. Importing an engine subject to 40 CFR 1068.325(e). This exemption is limited to members of the armed forces or
personnel of a foreign government on assignment to the U.S. for whom free entry has been authorized in writing by the U.S. Department of State, or
for members of the armed forces of a foreign country with official orders for duty in the U.S. This exemption does not apply to locomotive or marine
compression-ignition engines.
o 15. Delegated assembly. Importing a labeled engine for delegated assembly subject to 40 CFR 1068.325(f) or 1033.630. This exemption does not
apply to handheld spark-ignition engines or engines for recreational vehicles.
o 16. Partially complete engine. Importing an engine not yet in its final configuration covered by a certificate of conformity (or an engine that will be
installed in a vehicle covered by a certificate of conformity), subject to 40 CFR 1068.325(g). This also applies to an engine covered by a valid exemption. A certificate holder may also import a partially complete engine from its foreign facility to its U.S. facility as described in 40 CFR 1068.325(g).

EPA Form 3520-21

CBP entry no:
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Importation of Engines Excluded from U.S. EPA Emission Standards
o 17. Engine manufactured before emission standards started to apply. These engines must generally have already been placed into service.
See the attached schedule. Note that 40 CFR 1068.360 disallows importation of new engines not certified to standards corresponding to the model year
before the year of importation.
o 18. Competition engine. The engine must be used solely for competition, subject to 40 CFR 1068.310(a) or 85.1511(e). An EPA letter of approval
must be attached.
o 19. Stationary compression-ignition engine with displacement at or above 30 liters per cylinder or stationary spark-ignition engine above
19 kW that is not designed to run on gasoline or, if rich-burn, on liquified petroleum gas. These stationary engines are subject to EPA emission
standards under 40 CFR part 60 Subparts IIII and JJJJ, but are not required to be certified. The engine must be used in a stationary manner. See 40
CFR 60.4219, 60.4248 and 1068.310(b). The engine must be labeled as described in 40 CFR 1039.20 or 1048.20, as applicable. NOTE: Stationary
engines may be subject to state or local regulations.
o 20. Underground mining. Engine must be used in underground mining and regulated by the Mining Safety and Health Administration (MSHA). See
40 CFR 1039.5; see also 30 CFR parts 7, 31, 32, 36, 56, 57, 70, and 75. For compression-ignition engines only.
o 21. Hobby engine. Engine must be used to power a reduced-scale model of a vehicle not capable of transporting a person. See 40 CFR
1068.310(c).
Exemptions for Specific Engine Categories or Other Special Cases
o 22. Transition Program for Equipment Manufacturers. Importing a piece of equipment, subject to 40 CFR 1039.625 and 1039.626 (Category D).
Maximum engine power: ____________ o kW o HP (or identify the regulatory power category). Exempt from bond?____. If not exempt, NAIC # for
bond issuer:____________, policy number:____________, state of issue:___.
o 23. Personal-use exemption for small spark-ignition engines. Importing three or fewer nonroad spark-ignition engines at or below 19 kW for
purposes other than resale, where the importer has not used this exemption in the previous five years, subject to 40 CFR 1054.630.
24. Engine imported by an Independent Commercial Importer recognized by EPA. Only for Categories A and D above.
o 24a. For modification under an EPA certificate issued for the specific make, model, and model year under 40 CFR 85.1505, 89.605 or 1039.660.
o 24b. For modification and testing according to 40 CFR 85.1509. NOTE: The imported engine must be at least 6 years old.
o 24c. For precertification testing to obtain an EPA certificate under 40 CFR 85.1511(b)(3). NOTE: CBP bond is required. Specify location of storage
(required for 24a and 24b): _________________________________________________________________________________________________
NOTE: Under 24a and 24b, you may import up to five highway engines in a given model year that are certified to standards based on an engine’s
original production year. You may import any number of engines certified to standards that apply based on the year the engine is modified. See 40 CFR
85.1503.
o 25. Other exemption. Describe the exemption, attach EPA approval (if applicable), and identify the regulatory cite:

Declaration of Stationary, Nonroad or Heavy-duty Highway Engine, Nonroad Vehicle or Equipment, or Stationary Equipment
Port code:

CBP entry no:

Entry date:

Format: _
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Format: XXX9_
9_
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Format: mm/dd/yyyy
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Identify the engine (or vehicle) build date:
_____month_______year o on engine o other (explain)

Engine manufacturer; model and serial number of each engine; for certified engines or
vehicles, also identify the engine family name:

Vehicle or equipment manufacturer; model, serial number, and type of equipment
(if applicable):

EPA exemption number, required for codes 10, 11, 12, 18:

Names, Addresses, and Telephone Numbers of Relevant Parties
Certification: I certify that I have read and understand the purpose of this form, the penalties for falsely declaring information, for providing
misleading information, or for concealing a material fact. The information I have provided is correct, and all required attachments are appended to
this form. I authorize EPA Enforcement Officers to conduct inspections or testing permitted by the Clean Air Act. I am the owner, the importer, or an
agent of the owner or importer.
Signature:

Printed name:

Date:
Format: mm/dd/yyyy
_ _ __ ____

Identify the name, address, phone number, and e-mail address for the importer, broker, and owner as applicable:
Importer (required):

EPA Form 3520-21

Broker (optional):

Owner (optional):

Penalties: (1) Anyone who knowingly makes any false or fraudulent statement, or omits or conceals a material fact can be fined up to $320,000 or imprisoned for up to 5
years, or both (18 U.S.C. 1001). Anyone who illegally imports an engine may be fined up to $44,539 per engine (42 U.S.C. 7524), and may be subject to forfeiture of the
entire importation bond, if applicable (40 CFR 1068.335) and the engine is subject to seizure by CBP (19 CFR 162.21). (2) Anyone who distributes in commerce, sells,
offers for sale, or introduces into commerce an engine subject to EPA certification requirements but not covered by a certificate of conformity, may be fined up to
$44,539 per engine (40 CFR 1068.101(a). (3) Any person who circumvents or attempts to circumvent residence-time requirements for stationary engines may be fined
up to $44,539 per engine or piece of equipment (40 CFR 1068.101(b)(3)). Paperwork Reduction Act Notice: This collection of information is approved by OMB under
the Paperwork Reduction Act, 44 U.S.C. 3501 et seq. (OMB Control No. 2060-0717). Responses to this collection of information are mandatory (Clean Air Act Sections
203 and 208). An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB
control number. The public reporting and recordkeeping burden for this collection of information is estimated to 30 minutes per response. Send comments on the
Agency’s need for this information, the accuracy of the provided burden estimates and any suggested methods for minimizing respondent burden to the Regulatory
Support Division Director, U.S. Environmental Protection Agency (2821T), 1200 Pennsylvania Ave., NW, Washington, D.C. 20460. Include the OMB control number in
any correspondence. Do not send the completed form to this address.

Schedule for Application of New Emission Standards for Certifying Engines and Vehicles
Engine category

Engine subcategory

Manufacturing date after which
EPA certification is first required

A. Heavy-duty highway engines

—

Model year 1970

B. Locomotives or locomotive engines

—

January 1, 1973

C. Marine compression-ignition engines at or
above 37 kW

D. Other nonroad compression-ignition engines.

E. Marine spark-ignition engines.

Commercial: displacement < 0.9 L/cyl

Model year 2005

Commercial: 0.9 < displacement < 2.5 L/cyl

Model year 2004

Commercial: displacement > 2.5 L/cyl

Model year 2004

Recreational: displacement < 0.9 L/cyl

Model year 2007

Recreational: 0.9 < displacement < 2.5 L/cyl

Model year 2006

Recreational: displacement > = 2.5 L/cyl

Model year 2004

Marine compression-ignition engines: Power < 19 kW

January 1, 2000

Marine compression-ignition engines: 19 kW < Power < 37

Model year 1999

Nonroad engines: Power < 19 kW

January 1, 2000

Nonroad engines: 19 kW < Power < 37

January 1, 1999

Nonroad engines: 37 kW < Power < 75

January 1, 1998

Nonroad engines: 75 kW < Power < 130

January 1, 1997

Nonroad engines: 130 kW < Power < 560

January 1, 1996

Nonroad engines: Power > 560 kW

January 1, 2000

Outboard

Model year 1998

Personal watercraft

Model year 1999

Sterndrive/inboard

Model year 2010

F. Recreational spark-ignition engines and
vehicles

—

Model year 2006

G. Other nonroad spark-ignition engines at or
below 19 kW

—

Model year 1997

H. Other nonroad spark-ignition engines above
19 kW

—

Model year 2004

I. Stationary compression-ignition engines

—

April 1, 2006

All engines with maximum engine power < 19 kW
Non-emergency engines with maximum engine power between 19
and 373 kW

July 1, 2008

Non-emergency engines with maximum engine power > 373 kW

July 1, 2007

J. Stationary spark-ignition engines

Emergency engines with maximum engine power > 19 kW

January 1, 2009

Decision flowchart for vehicles
1. Is it a motor vehicle?
§85.1703: A vehicle which is self-propelled and capable of
transporting a person or persons or any material or any
permanently or temporarily affixed apparatus shall be deemed
a motor vehicle, unless any one or more of the criteria set forth
below are met, in which case the vehicle shall be deemed not a
motor vehicle:
! The vehicle cannot exceed a maximum speed of 25
miles per hour over level, paved surfaces; or
! The vehicle lacks features customarily associated
with safe and practical street or highway use, such
features including, but not being limited to, a reverse
gear (except in the case of motorcycles), a
differential, or safety features required by state and/or
federal law; or
! The vehicle exhibits features which render its use on
a street or highway unsafe, impractical, or highly
unlikely, such features including, but not being
limited to, tracked road contact means, an inordinate
size, or features ordinarily associated with military
combat or tactical vehicles such as armor and/or
weaponry.

-If yes, 40 CFR parts 85 and 86 apply.
-If not, see #2.
2. Is it an off-highway motorcycle or snowmobile?
§1051.801: Off-highway motorcycle means a two-wheeled
vehicle with a nonroad engine and a seat (excluding marine
vessels and aircraft). (Note: highway motorcycles are
regulated under 40 CFR part 86.)
§1051.801: Snowmobile means a vehicle designed to operate
outdoors only over snow-covered ground, with a maximum
width of 1.5 meters or less.

-If yes, part 1051 applies. Note that §§1051.605 and
1051.610 allow for vehicles or engines to be certified
under part 86 or 1048. Note also that diesel-fueled
engines used with off-highway motorcycles or
snowmobiles may be certified under part 89 or 1039
under the provisions of §1051.5.
-If not, see #3.
3. Is it an offroad utility vehicle?
§1051.801: Offroad utility vehicle means a nonroad vehicle
that has four or more wheels, seating for two or more persons,
is designed for operation over rough terrain, and has either a
rear payload capacity of 350 pounds or more or seating for six
or more passengers. Vehicles intended primarily for
recreational purposes that are not capable of transporting six
passengers (such as dune buggies) are not offroad utility
vehicles. (Note: §1051.1(a) specifies that some offroad utility
vehicles are required to meet the requirements that apply for
all-terrain vehicles.)

-If yes, see #4.
-If not, see #5.
4. Is the offroad utility vehicle subject to part 1051?
§1051.1(a)(4) Offroad utility vehicles with engines with
displacement less than or equal to 1000 cc, maximum engine
power less than or equal to 30 kW, and maximum vehicle

speed higher than 25 miles per hour. Offroad utility vehicles
that are subject to this part are subject to the same
requirements as ATVs. This means that any requirement that
applies to ATVs also applies to these offroad utility vehicles,
without regard to whether the regulatory language mentions
offroad utility vehicles.

-If yes, part 1051 applies. Note that §§1051.605 and
1051.610 allow for vehicles or engines to be certified
under part 86 or 1048. Note also that diesel-fueled
engines used with offroad utility vehicles may be
certified under part 89 or 1039 under the provisions of
§1051.5.
-If not, see #6.
5. Is it an all-terrain vehicle?
§1051.801: All-terrain vehicle means a land-based or
amphibious nonroad vehicle that meets either of the following
criteria:
(1) Vehicles designed to travel on four low pressure tires,
having a seat designed to be straddled by the operator and
handlebars for steering controls, and intended for use by a
single operator and no other passengers are all-terrain vehicles.
(2) Other all-terrain vehicles have three or more wheels and
one or more seats, are designed for operation over rough
terrain, are intended primarily for transportation, and have a
maximum vehicle speed of 25 miles per hour or higher. Golf
carts generally do not meet these criteria since they are
generally not designed for operation over rough terrain.
NOTE: Amphibious vehicle means a vehicle with wheels or
tracks that is designed primarily for operation on land and
secondarily for operation in water.

-If yes, part 1051 applies. Note that §§1051.605 and
1051.610 allow for vehicles or engines to be certified
under part 86 or 1048. Note also that diesel-fueled
engines used with all-terrain vehicles may be certified
under part 89 or 1039 under the provisions of §1051.5.
-If not, see #6.
6. Does it have a spark-ignition engine?
§1054.801: Spark-ignition means relating to a gasoline-fueled
engine or any other type of engine with a spark plug (or other
sparking device) and with operating characteristics
significantly similar to the theoretical Otto combustion cycle.
Spark-ignition engines usually use a throttle to regulate intake
air flow to control power during normal operation.

-If yes, see #7.
-If not, it is subject to standards for diesel engines
(marine part 1042, locomotive part 1033, or other landbased nonroad part 1039).
7. Is it a marine vessel?
§1054.801: Marine vessel has the meaning given in 1 U.S.C.
3, except that it does not include amphibious vehicles
[See #5]. The definition in 1 U.S.C. 3 very broadly includes
every craft capable of being used as a means of transportation
on water.

-If yes, part 1045 applies.
-If not, the engine is subject to standards for Small SI or
Large SI engines, depending on the maximum engine
power and total displacement.