§ 90.213 - Averaging under the optional program.

(a) Negative credits from engine families with FELs above the applicable emission standard must be offset by positive credits from engine families having FELs below the applicable emission standard, as allowed under the provisions of this subpart. Averaging of credits in this manner is used to determine compliance under § 90.216(b).

(b) Cross-class averaging of credits is allowed across all classes of nonroad spark-ignition handheld engines at or below 19 kW participating in the optional transition year program.

(c) Credits used in averaging for a given model year may be obtained from credits generated in the same model year by another engine family, credits banked in previous model years, or credits of the same or previous model year obtained through trading. The restrictions of this paragraph (c) notwithstanding, credits from a given model year may be used to address credit needs of previous model year engines as allowed under § 90.216(c).

(d) The use of credits generated under the early banking provisions of § 90.214(b) is subject to regulations under this subpart.