SECTION 6. EFFECTIVE DATES

.01 Issuers may rely on this revenue procedure to determine average area purchase price safe harbors for commitments to provide financing or issue mortgage credit certificates that are made, or (if the purchase precedes the commitment) for residences that are purchased, in the period that begins on March 22, 2011, and ends on the date as of which the safe harbors contained in section 4.01 of this revenue procedure are rendered obsolete by a new revenue procedure.

.02 Notwithstanding section 5 of this revenue procedure, issuers may continue to rely on the average area purchase price safe harbors contained in Rev. Proc. 2010–25, with respect to bonds sold, or for mortgage credit certificates issued with respect to bond authority exchanged, before April 21, 2011, if the commitments to provide financing or issue mortgage credit certificates are made on or before May 21, 2011. .03 Except as provided in section 6.04, issuers must use the nationwide average purchase price limitation contained in

this revenue procedure for commitments to provide financing or issue mortgage credit certificates that are made, or (if the purchase precedes the commitment) for residences that are purchased, in the period that begins on March 22, 2011, and ends on the date when the nationwide average purchase price limitation is rendered obsolete by a new revenue procedure.

.04 Notwithstanding sections 5 and 6.03 of this revenue procedure, issuers may continue to rely on the nationwide average purchase price set forth in Rev. Proc. 2010–25 with respect to bonds sold, or for mortgage credit certificates issued with respect to bond authority exchanged, before April 21, 2011, if the commitments to provide financing or issue mortgage credit certificates are made on or before May 21, 2011.