Mich. Comp. Laws § 484.1312

Sec. 312. (1) Except as otherwise provided under subsection (2), after a final 9-1-1 service plan has been adopted under section 310, a county may amend the final 9-1-1 service plan only by complying with the procedures described in sections 301 to 310. Upon adoption of an amended final 9-1-1 service plan by the county board of commissioners, the county shall forward the amended final 9-1-1 service plan to the service supplier or suppliers designated to provide 9-1-1 service within the 9-1-1 service district as amended. Upon receipt of the amended final 9-1-1 service plan, each designated service supplier shall implement as soon as feasible the amendments to the final 9-1-1 service plan in the 9-1-1 service district as amended. (2) The county board of commissioners may by resolution make minor amendments to the final 9-1-1 service plan for any of the following: (a) Changes in PSAP premises equipment, including, but not limited to, computer-aided dispatch systems, call processing equipment, and computer mapping. (b) Changes involving the participating public safety agencies within a 9-1-1 service district. (c) Changes involving the addition or deletion of primary or secondary PSAPs within the 9-1-1 service district. (d) Changes in the 9-1-1 charges collected by the county subject to the limits under this act. (e) Changes in 9-1-1 service providers to include IP-based 9-1-1 service providers that meet the next generation 9-1-1 standards set by the National Emergency Number Association.