; and (ii) in the case of use by a non-Federal interest of dredged material disposal capacity required for project purposes under subparagraph (A)(ii), any increase in the cost of operation and maintenance of the project that the Secretary determines results from the use of the project capacity by the non-Federal interest in advance of each cycle of dredging. (C) Credit In the event the Secretary determines that the cost to operate or maintain the project decreases as a result of use by the non-Federal interest of dredged material disposal capacity required for project purposes under subparagraph (A)(ii), the Secretary, at the request of the non-Federal interest, shall credit the amount of the decrease toward any cash contribution of the non-Federal interest required thereafter for construction, operation, or maintenance of the project, or of another navigation project. ; (3) in paragraph (2), in the first sentence, by inserting under paragraph (1)(A)(i) after additional capacity ; and (4) by adding at the end the following: (3) Special rule for designation of replacement capacity facility or site (A) In general Subject to such terms and conditions as the Secretary determines to be necessary or advisable, an agreement under paragraph (1)(B) for use permitted under paragraph (1)(A)(ii) shall reserve to the non-Federal interest— (i) the right to submit to the Secretary for approval at a later date an alternative to the facility or site designated in the agreement for construction of replacement capacity