; (B) will use grants in areas having the infrastructure or planned infrastructure necessary to replace dated manufactured homes; (C) will act in partnership with providers of high quality affordable lending products that enable sustainable homeownership; or (D) will supplement assistance provided to eligible owners of dated manufactured homes pursuant to a grant under this section with funds from other sources, and provide such assurances as the Secretary considers necessary to ensure that such supplemental amounts are available for such purpose. (3) Use of funds A grantee shall use amounts from a grant provided under this section only to provide assistance to owners of dated manufactured homes in accordance with subsection (c). (4) Failure by grantees to act If a grantee fails to use any portion of grant provided under this section during the 36-month period beginning on the date of receipt of the grant amounts— (A) the unused amount of the grant shall revert to the Secretary