25 Pa. Code § 92a.5 – Prohibitions.

(a) The provisions of 40 CFR 122.4 (relating to prohibitions (applicable to State NPDES programs, see 123.25)) are incorporated by reference.
(b) A permit may not be issued, modified or reissued for a sanitary sewer overflow.

This section cited in 25 Pa. Code § 92a.3 (relating to incorporation of Federal regulations by reference).