(1) A covered party may use ERUs to meet the compliance obligation in WAC 173-442-200.

(2) ERUs must originate from GHG emission reductions occurring within Washington unless derived from allowances under WAC 173-442-170.

(3) Mandatory retirement of ERUs for compliance.

(a) Ecology must retire an ERU applied to meet a compliance obligation.

(b) The use of an ERU for compliance, as recorded in a compliance report required by WAC 173-442-200 or the registry established in WAC 173-442-230, permanently and irrevocably disqualifies any further use of the unit.