(d) Modification of Lease form. The owner , with the prior approval of HUD or, for a 24 CFR part 883 project, the Agency , may modify the terms and conditions of the lease form effective at the end of the initial term or a successive term, by serving an appropriate notice on the family , together with the offer of a revised lease or an addendum revising the existing lease. This notice and offer must be received by the family at least 30 days prior to the last date on which the family has the right to terminate the tenancy without being bound by the modified terms and conditions. The family may accept the modified terms and conditions by executing the offered revised lease or addendum, or may reject the modified terms and conditions by giving the owner written notice in accordance with the lease that the family intends to terminate the tenancy. Any increase in rent must in all cases be governed by § 880.609 and other applicable HUD regulations.