(a) The inmate population of the institutional division may not exceed 100 percent of the combined capacities of each unit in the division, as determined by this subchapter.
(b) The attorney general may authorize the institutional division to increase the inmate population of the division above 100 percent, but only if:
(1) the staff determines through written findings that the population may be increased without limiting the ability of the division to transfer inmates between units as necessary for classification, medical, and security purposes; and
(2) the administration of the department, the board, and the governor approve of the increase, in the same manner as increases in capacity of individual units are approved under Sections 499.104, 499.105, and 499.106.

(c) If the attorney general authorizes the institutional division to increase the inmate population of the division above 100 percent, the institutional division shall distribute the additional admissions permitted by the increase among counties or groups of counties in the same manner as regular admissions are distributed under the allocation formula.