(b) Notwithstanding subdivision (a), multiple congregate living health facilities may exist in one multifloor building if all of the following requirements are satisfied:

1. (1) Each facility meets other applicable building standards not related to multiple floors.
2. (2) Each facility is separated by a wall, floor, or other permanent partition but may share an elevator, stairs, or stairwell, and need not be freestanding.
3. (3) Proposals to develop proximate congregate living health facilities are supported by the county health department and the board of supervisors in the county in which the facilities are to be located.

4. (4) The congregate living health facilities are proposed for one of the following locations:

   1. (A) McClellan Air Force Base Building No. 522, located at 3201 James Way, McClellan, California.
   2. (B) McClellan Air Force Base Building No. 523, located at 3207 James Way, McClellan, California.
   3. (C) McClellan Air Force Base Building No. 524, located at 5621 Dudley Blvd., McClellan, California.
   4. (D) McClellan Air Force Base Building No. 525, located at 5327 Dudley Blvd., McClellan, California.