charged with the cost thereof and shall remain available until expended: Provided further , That rental payments under any such lease, contract, or occupancy for items other than such utilities, services, or repairs shall be deposited into the Treasury as miscellaneous receipts. 171. For fiscal year 2021, in addition to payments made pursuant to 53106 of title 46, United States Code, the Secretary shall pay to the contractor for an operating agreement entered into pursuant to chapter 531 of title 46, United States Code, for each vessel that is covered by such operating agreement as of the date of enactment of this Act, an amount equal to $500,000: Provided, That payments authorized by this section shall be paid not later than 60 days after the date of enactment of this Act: Provided further, That any unobligated balances remaining from the amounts made available for payments under the heading Maritime Administration—Maritime Security Program in any prior Act may be used for such payments. Pipeline and hazardous materials safety administration Operational expenses For necessary operational expenses of the Pipeline and Hazardous Materials Safety Administration, $25,715,000, of which $1,500,000 shall remain available until September 30, 2023. Hazardous materials safety For expenses necessary to discharge the hazardous materials safety functions of the Pipeline and Hazardous Materials Safety Administration, $62,000,000, to remain available until September 30, 2023: Provided , That up to $800,000 in fees collected under section 5108(g) of title 49, United States Code, shall be deposited in the general fund of the Treasury as offsetting receipts: Provided further , That there may be credited to this appropriation, to be available until expended, funds received from States, counties, municipalities, other public authorities, and private sources for expenses incurred for training, for reports publication and dissemination, and for travel expenses incurred in performance of hazardous materials exemptions and approvals