1. (1) maintain a backup PSAP site, wired and ready with the ability to receive and dispatch emergency calls, for use in case of the necessity to vacate the primary PSAP;
2. (2) have a written continuity of operations plan for evacuating the primary PSAP and transferring operations to the backup site; and

3. (3) conduct and document no less than one exercise per year that utilizes the continuity of operations plan.

   (b) Overflow calls.

   The authority shall have a written policy to handle overflow of wireless 911 calls.

(a) Backup site.

The authority shall: