(1)(a) Permit modifications shall follow the permit issuance requirements of WAC 173-406-600, 173-401-810 and 173-401-820.

(b) For purposes of applying (a) of this subsection, a permit modification shall be treated as an acid rain permit application, to the extent consistent with WAC 173-406-700.

(2) The following permit revisions are permit modifications:

(a) Relaxation of an excess emission offset requirement after approval of the offset plan by the administrator;

(b) Incorporation of a final nitrogen oxides alternative emission limitation following a demonstration period;

(c) Determinations concerning failed repowering projects under WAC 173-406-402 (6)(a)(i) and (b); and

(d) At the option of the designated representative submitting the permit revision, the permit revisions listed in WAC 173-406-703(2).