133 STAT. 893  PUBLIC LAW 116–20—JUNE 6, 2019  a spend plan specifying funding estimates for audits and investiga- tions of any such declared disasters occurring in 2018 and identi- fying funding estimates or carryover balances, if any, that may  be available for audits and investigations of any other such declared  disasters:  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.  For an additional amount for ‘‘Military Construction, Navy  and Marine Corps’’, $600,000,000, to remain available until Sep- tember 30, 2023, for planning and design, and construction expenses  related to the consequences of Hurricanes Florence and Michael  on Navy and Marine Corps installations:  Provided , That none of  the funds shall be available for obligation until the Committees  on Appropriations of the House of Representatives and the Senate  receive a master plan for the installations:  Provided further , That,  not later than 60 days after enactment of this Act, the Secretary  of the Navy, or his designee, shall submit to the Committees on  Appropriations of the House of Representatives and the Senate  a detailed expenditure plan for funds provided under this heading:  Provided further , That such funds may be obligated or expended  for planning and design and military construction projects not other- wise authorized by law:  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.  Deadline.  Expenditure  plans.  MILITARY CONSTRUCTION, NAVY AND MARINE CORPS  DEPARTMENT OF DEFENSE  TITLE X  MILITARY CONSTRUCTION, AIR FORCE  Deadline.  Expenditure  plan.  For an additional amount for ‘‘Military Construction, Air Force’’,  $1,000,000,000, to remain available until September 30, 2023, for  planning and design, and construction expenses related to the con- sequences of Hurricane Michael and floods occurring in calendar  year 2019:  Provided , That none of the funds shall be available  for obligation until the Committees on Appropriations of the House  of Representatives and the Senate receive a basing plan and future  mission requirements for installations significantly damaged by  Hurricane Michael:  Provided further , That, not later than 60 days  after enactment of this Act, the Secretary of the Air Force, or  his designee, shall submit to the Committees on Appropriations  of the House of Representatives and the Senate a detailed expendi- ture plan for funds provided under this heading:  Provided further ,  That such funds may be obligated or expended for planning and  design and military construction projects not otherwise authorized  by law:  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 Con- trol Act of 1985. 