; (3) wholly or partly suspend or terminate the grant agreement; (4) refer the grantee to the appropriate office within the Department for further enforcement action; and (5) take other remedies that may be legally available. (i) Report on the community challenge grant (1) In general Not later than 120 days after the date on which the grant agreement under subsection (g) expires, an eligible entity that receives a grant under the grant program shall submit a final report on the project to the Secretary. (2) Contents of report The report shall include— (A) a detailed explanation of the activities undertaken using the grant, including an explanation of the completed project and how it achieves specific transit-oriented, transportation, housing, or sustainable community goals within the region; (B) a discussion of any obstacles encountered in the planning and implementation process and how the eligible entity overcame the obstacles; (C) an evaluation of the success of the project using the performance measures established under subsection (g), including an evaluation of the planning and implementation process and how the project contributes to carrying out the comprehensive regional plan; (D) outline of any proposed follow-up activities including commitments of additional planned public or private investments; and (E) any other information the Director may require. (3) Interim reports The Director may require an eligible entity to submit an interim report or reports before the date on which the project for which the grant is awarded is completed. (j) Authorization of appropriations There are authorized to be appropriated to the Secretary for the award of grants under this section, to remain available until expended— (1) $175,350,000 for each of fiscal years 2025 through 2026; (2) $203,700,000 for fiscal year 2027; (3) $233,100,000 for fiscal year 2028