(a) Before construction begins on a unit of the institutional division for which construction was not approved before January 1, 1991, the board shall establish a maximum capacity for the unit.
(b) Maximum capacity for a unit must be established under this section in the same manner as maximum capacity for a unit is increased under Sections 499.102, 499.104, 499.105, 499.106, and 499.107, except that time limits on official actions imposed by those sections do not apply.

(c) This section does not apply to a 2,250-bed (Michael-type) unit or a 1,012-bed (Daniel-type) unit, approved on or after January 1, 1991, unless the design for the unit is significantly altered or space in the unit is reduced.