may be used only for the purpose of providing for the continuation of transit benefits: Provided further , That the Working Capital Fund will be fully reimbursed by each customer agency from available funds for the actual cost of the transit benefit. 104. For an additional amount for “Office of the Secretary—Salaries and Expenses”, $2,052,000, to become available on the date on which the Secretary announces the selection of projects to receive awards for each of the following competitive grants, with respect to funds made available for fiscal year 2017 or fiscal year 2018 for such grants: (a) Federal-State Partnership for State of Good Repair Grants, as authorized by section 24911 of title 49, United States Code, and as funded under the heading “Federal Railroad Administration—Federal-State Partnership for State of Good Repair Grants” by Public Law 115–31 and as funded under the heading “Federal Railroad Administration—Federal-State Partnership for State of Good Repair” by Public Law 115–141