§1048.145 What provisions apply only for a limited time?

The provisions in this section apply instead of other provisions in this part. This section describes when these interim provisions expire.

(a) Family banking. You may certify an engine family to comply with Tier 1 or Tier 2 standards earlier than necessary. For each model year of early compliance for an engine family, you may delay compliance with the same standards for an equal number of engines from another engine family (or families) for one model year. If you certify engines under the voluntary standards of §1048.140, you may not use them in your calculation under this paragraph (a). Base your calculation on actual power-weighted nationwide sales for each family. You may delay compliance for up to three model years. For example, if you sell 1,000 engines with an average power rating of 60 kW certified a year early, you may delay certification to that tier of standards for up to 60,000 kW-engine-years in any of the following ways:

(1) Delay certification of another engine family with an average power rating of 100 kW of up to 600 engines for one model year.

(2) Delay certification of another engine family with an average power rating of 100 kW of up to 200 engines for three model years.

(3) Delay certification of one engine family with an average power rating of 100 kW of up to 400 engines for one model year and a second engine family with an average power rating of 200 kW of up to 50 engines for two model years.

(b) Hydrocarbon standards. For 2004 through 2006 model years, engine manufacturers may use nonmethane hydrocarbon measurements to demonstrate compliance with applicable emission standards.

(c) Transient emission testing. Engines rated over 560 kW are exempt from the transient emission standards in §1048.101(a).

(d) Tier 1 deterioration factors. For Tier 1 engines, base the deterioration factor from §1048.240 on 3500 hours of operation. We may assign a deterioration factor for a Tier 1 engine family, but this would not affect your need to meet all emission standards that apply.

(e) [Reserved]

(f) Optional early field testing. You may optionally use the field-testing procedures in subpart F of this part for any in-use testing required under subpart E of this part to show that you meet Tier 1 standards. In this case, the same Tier 1 in-use emission standards apply to both steady-state testing in the laboratory and field testing.

(g) Small-volume provisions. If you qualify for the hardship provisions in §1068.250 of this chapter, we may approve extensions of up to four years total.

(h) 2004 certification. For the 2004 model year, you may choose to have the emission standards and other requirements that apply to these engines in California serve as the emission standards and other requirements applicable under this part, instead of those in subpart A of this part. To ask for a certificate under this paragraph (h), send us the application for certification that you prepare for the California Air Resources Board instead of the information we otherwise require in §1048.205.

(i) Recreational vehicles. Engines or vehicles identified in the scope of 40 CFR part 1051 that are not yet regulated under that part are excluded from the requirements of this part. For example, snowmobiles produced in 2004 are not subject to the emission standards in this part. Once emission standards apply to these engines and vehicles, they are excluded from the requirements of this part under §1048.5(a)(1).