To the extent authorized by the CWA and the Act, the Board may grant variances, adjusted standards, or time limited water quality standards from standards, limitations, and requirements imposed by these NPDES rules. If the Board grants a variance, adjusted standard, or time-limited water quality standard, the Board must order the Agency to issue or modify an NPDES Permit consistent with the Board Order, the CWA, federal NPDES regulations, and the Act.

(Source: Amended at 47 Ill. Reg. 5017, effective March 23, 2023)