45 C.F.R. § 672.7
(c) Content and amendment of the complaint. All complaints shall include:
(d) Each complaint for the assessment of a civil penalty shall also include:
(e) Each complaint for the revocation or suspension of a permit shall also include:
(3) A statement indicating the basis for recommending the revocation, rather than the suspension, of the permit, or vice versa.
A copy of these rules shall accompany each complaint served.