# Heavy-duty Vehicle and Engine Greenhouse Gas Emission Regulations

Marginal note:Calculation

**35**(1) A company must calculate the credits or deficits for each of its fleets or subfleets, as the case may be, using the equation set out in one of the following paragraphs, whichever applies:(a) for Class 2B and Class 3 heavy-duty vehicles and cab-complete vehicles, excluding those referred to in the definition vocational vehicle in subsection 1(1),

ECD = ((A – B) × C × D) ÷ (1 000 000)

where

- ECD
- is the number of credits, if the result is positive, or the number of deficits, if the result is negative, expressed in megagrams of CO
_{2}and rounded in accordance with subsection 35(2), - A
- is the fleet average CO
_{2}emission standard calculated in accordance with section 22, expressed in grams of CO_{2}per mile, - B
- is the fleet average CO
_{2}emission value calculated in accordance with section 23, expressed in grams of CO_{2}per mile, - C
- is the number of vehicles in the fleet, and
- D
- is the useful life for the vehicle, namely, 120,000 miles;

(b) for vocational vehicles and incomplete vocational vehicles and subject to subsection 38(2) and clause 41(1)(b)(ii)(A),

ECD = ((A – B) × C × D × E) ÷ (1 000 000)

where

- ECD
- is the number of credits, if the result is positive, or the number of deficits, if the result is negative, expressed in megagrams of CO
_{2}and rounded in accordance with subsection 35(2), - A
- is the CO
_{2}emission standard under subsection 26(1) that applies to the vehicles of the subfleet, expressed in grams of CO_{2}per tonne-mile, - B
- is the CO
_{2}family emission limit and corresponds to the CO_{2}emission rate for the subfleet of vehicles, expressed in grams of CO_{2}per tonne-mile, determined in accordance with subsection 26(2), - C
- is the payload for the class of vehicles, as follows:
- D
- is the number of vehicles in the subfleet, and
- E
- is the useful life for the class of vehicles, as follows:

(c) for tractors and incomplete tractors and subject to subsection 38(2) and clause 41(1)(b)(ii)(B),

ECD = ((A – B) × C × D × E) ÷ (1 000 000)

where

- ECD
- is the number of credits, if the result is positive, or the number of deficits, if the result is negative, expressed in megagrams of CO
_{2}and rounded in accordance with subsection 35(2), - A
- is the CO
_{2}emission standard under subsection 27(1) that applies to the tractors and incomplete tractors of the subfleet, expressed in grams of CO_{2}per tonne-mile, - B
- is the CO
_{2}family emission limit and corresponds to the CO_{2}emission rate for the subfleet of tractors and incomplete tractors, expressed in grams of CO_{2}per tonne-mile, determined in accordance with subsection 27(2), - C
- is the payload for the class of tractors and incomplete tractors, as follows:
- D
- is the number of tractors and incomplete tractors in the subfleet, and
- E
- is the useful life for the class of tractors or incomplete tractors, as the case may be, as follows:

(d) for heavy-duty engines and subject to subparagraph 41(1)(c)(iii),

ECD = ((A – B) × C × D × E) ÷ (1 000 000)

where

- ECD
- is the number of credits, if the result is positive, or the number of deficits, if the result is negative, expressed in megagrams of CO
_{2}and rounded in accordance with subsection 35(2), - A
- is the CO
_{2}emission standard that applies to the fleet of heavy-duty engines under section 30 or subsection 31(2), as the case may be, expressed in grams per BHP-hr, - B
- is the CO
_{2}family certification level for the fleet and corresponds to the CO_{2}deteriorated emission level value, using the applicable emission value calculated in accordance with section 32 and subject to subsection (3), expressed in grams of CO_{2}per BHP-hr, - C
- is the transient cycle conversion factor calculated in accordance with the applicable variable “CF” in section 705(b) of Title 40, chapter I, subchapter U, part 1036, subpart H, of the CFR,
- D
- is the number of engines in the fleet, and
- E
- is the useful life for the engine, as follows:

Marginal note:Fleets

(2) The credits or deficits for each averaging set of heavy-duty vehicles and heavy-duty engines are determined by adding the credits and deficits for all fleets and subfleets, if applicable. The credits and deficits must be added together before rounding and the result must be rounded to the nearest megagram of CO

_{2}.Marginal note:Duty cycle

(3) In the case of medium heavy-duty engines and heavy heavy-duty engines that are designed to be used in both vocational vehicles or incomplete vocational vehicles and in tractors or incomplete tractors, a company must select the duty cycle set out in paragraph 32(1)(b) that corresponds to the vehicle in which the engine is installed for the purpose of calculating the value determined for B in the formula set out in paragraph (1)(d).

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