; (bb) a statement explaining why discharges that could be authorized by the general license or permit will not comply with the identified water quality requirements; and (cc) if the denial is due to insufficient information, a description of the specific water quality data or information, if any, that would be needed to assure that the range of discharges that could be authorized by the general license or permit from potential projects will comply with water quality requirements. (D) Review period (i) In general Subject to clause (iii), a licensing or permitting agency shall, categorically or on a case-by-case basis for each certification application, establish a reasonable period of time (not to exceed 1 year from the date of receipt of the certification application) within which a certifying authority shall issue a final action on the certification application. (ii) Failure to act If a certifying authority fails or refuses to issue a final action as described in subparagraph (F) on a certification application by the end of the reasonable period of time established under clause (i) and the reasonable period of time has not been extended in accordance with clause (iii), the requirement for a certification under subparagraph (B) shall be waived. (iii) Requirement for extension With respect to a certification application, the reasonable period of time established under clause (i) may only be extended if— (I) the extension is requested, in writing, by the applicant