The Legislature shall continue to have the exclusive use of all of the space in the main unit of the capitol building on the two floors above the ground floor, the main unit being that portion of the capitol building connecting the east and west wings. In addition, the following space in the capitol building is assigned to and set aside for the exclusive use of the Legislature, with the use thereof to be determined as specified:
(1) All of the space on the second floor of the east wing of the capitol building as assigned by the Speaker of the House of Delegates;(2) All of the space on the second floor of the west wing of the capitol building as assigned by the President of the Senate, except that room designated and numbered W-212 and the large vault used and occupied by the land division of the state auditor's office;(3) The room designated and numbered MB-27A on the basement floor of the main unit of the capitol building as assigned by the President of the Senate;(4) The rooms designated and numbered E-126, E-128, E-130, E-132, E-134, E-136 and E-138 on the ground floor of the east wing of the capitol building and the rooms designated and numbered E-140, E-146, E-146C, E-146D, E-146K, R-152, R-153, R-2, R-4 and R-6 on the ground floor of the main unit of the capitol building and the rooms on the basement floor of the main unit of the capitol building designated and numbered MB-26A, MB-26B, MB-32A, MB-37 and MB-39 as assigned by the joint committee on government and finance, with approval of the President of the Senate and the Speaker of the House of Delegates; and(5) All of the space on the third floor of the west wing of the capitol building, which space shall be made available to the Legislature as soon as possible but shall in any event be made available for occupancy by the Legislature not later than July one, one thousand nine hundred eighty-seven. The space described in this subdivision (5) shall be used as assigned by the President of the Senate and the Speaker of the House of Delegates with the approval of the joint committee on government and finance.