(a) Once a certifying agency determines that an application is complete, it may request further information from the applicant. Such information must clarify, amplify, correct, or otherwise supplement the contents of a complete application in order for the certifying agency to determine whether a certification should be issued. Supplemental information may include evidence of compliance with appropriate requirements of a water quality control plan.

(b) If an application is determined to be complete by the certifying agency but supplemental information is requested by the certifying agency pursuant to Subsection (a) of this Section, an extension of the federal period for certification cannot be obtained, and the federal period for certification will expire before the certifying agency can receive and properly review the supplemental information, the certifying agency shall deny without prejudice certification for any discharge resulting from the proposed activity unless the applicant in writing withdraws the request for certification.

(c) If an application is determined to be complete by the certifying agency, but CEQA requires that the certifying agency review a final environmental document before taking a certification action, an extension of the federal period for certification cannot be obtained, and the federal period for certification will expire before the certifying agency can receive and properly review the necessary environmental documentation, the certifying agency shall deny without prejudice certification for any discharge resulting from the proposed activity unless the applicant in writing withdraws the request for certification.