; and (2) advance the implementation of priority actions or needs identified in the Chesapeake Bay watershed-wide strategy adopted under section 3(c)(2). (d) Cost sharing (1) Department of the Interior share The Department of the Interior share of the cost of a project funded under the grant program shall not exceed 50 percent of the total cost of the project, as determined by the Secretary. (2) Non-Department of the Interior share (A) In general The non-Department of the Interior share of the cost of a project funded under the grant program may be provided in cash or in the form of an in-kind contribution of services or materials. (B) Other Federal funding Non-Department of the Interior Federal funds may be used for not more than 25 percent of the total cost of a project funded under the grant program. (e) Administration The Secretary may enter into an agreement to manage the grant program with an organization that offers grant management services. 5. Reporting Not later than 180 days after the date of enactment of this Act, and annually thereafter, the Secretary shall submit to Congress a report describing the implementation of this Act, including a description of each project that has received funding under this Act. 6. Authorization of appropriations (a) In general There are authorized to be appropriated such sums as are necessary to carry out this Act. (b) Supplement, not supplant Funds made available under subsection (a) shall supplement, and not supplant, funding for other activities conducted by the Secretary in the Chesapeake Bay watershed.