the amount of advance billings rendered or imposed by Defense working capital funds may exceed $1,000,000,000. In the preceding sentence, the term ‘‘advance billing’’ has the meaning given the term in section 2208(l)(4) of such title. IV Energy and Water Development and Related Agencies Corps of engineers—civil Department of the army Corps of engineers—civil Operation and maintenance For an additional amount for Operation and Maintenance , $50,000,000, to remain available until September 30, 2021, to prevent, prepare for, and respond to coronavirus: Provided , That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Expenses For an additional amount for Expenses , $20,000,000, to remain available until September 30, 2021, to prevent, prepare for, and respond to coronavirus: Provided , That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Department of the interior Bureau of reclamation Water and related resources (including transfer of funds) For an additional amount for Water and Related Resources , $12,500,000, to remain available until September 30, 2021, to prevent, prepare for, and respond to coronavirus: Provided , That $500,000 of the funds provided under this paragraph shall be transferred to the Central Utah Project Completion Account to prevent, prepare for, and respond to coronavirus: Provided further , That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Policy and administration For an additional amount for Policy and Administration , $8,100,000, to remain available until September 30, 2021, for necessary expenses to prevent, prepare for, and respond to coronavirus: Provided , That such amount is designated by