40 CFR 121.3: Scope of certification.

(a) When a certifying authority reviews a request for certification, the certifying authority shall evaluate whether the activity will comply with applicable water quality requirements. The certifying authority's evaluation is limited to the water quality-related impacts from the activity subject to the Federal license or permit, including the activity's construction and operation.

(b) Consistent with the scope of review identified in paragraph (a) of this section, a certifying authority shall include any conditions in a grant of certification necessary to assure that the activity will comply with applicable water quality requirements.