; and (4) in the case of proposed alternative maps received by the Administrator pursuant to such section 1360(a)(2), not later than the expiration of the 6-month period beginning upon receipt of such proposed alternative maps— (A) determine whether such maps were developed in accordance with the standards and requirements adopted pursuant to paragraph (3) of this subsection; and (B) approve or disapprove such proposed maps for use under National Flood Insurance Program. ; and (3) in subsection (d)(1), by inserting maximum before 30-day period each place such term appears in subparagraphs (B) and (C).