(A) Within sixty days after receipt of the final plan pursuant to division (C) of section 128.07 of the Revised Code, the board of county commissioners of the county and the legislative authority of each municipal corporation in the county and of each township whose territory is proposed to be included in a countywide 9-1-1 system shall act by resolution to approve or disapprove the plan, except that, with respect to a final plan that provides for funding of the 9-1-1 system in part through charges imposed under section 128.22 of the Revised Code, the board of county commissioners shall not act by resolution to approve or disapprove the plan until after a resolution adopted under section 128.22 of the Revised Code has become effective as provided in division (D) of that section. A municipal corporation or township whose territory is proposed to be included in the system includes any municipal corporation or township in which a part of its territory is excluded pursuant to division (A)(2) of section 128.03 of the Revised Code. Each such authority immediately shall notify the board of county commissioners in writing of its approval or disapproval of the final plan. Failure by a board or legislative authority to notify the board of county commissioners of approval or disapproval within such sixty-day period shall be deemed disapproval by the board or authority.

(B) As used in this division, “county’s population” excludes the population of any municipal corporation or township that, under the plan, is completely excluded from 9-1-1 service in the county’s final plan. A countywide plan is effective if all of the following entities approve the plan in accordance with this section:

(1) The board of county commissioners;

(2) The legislative authority of a municipal corporation that contains at least thirty per cent of the county’s population, if any;

(3) The legislative authorities of municipal corporations and townships that contain at least sixty per cent of the county’s population or, if the plan has been approved by a municipal corporation that contains at least sixty per cent of the county’s population, by the legislative authorities of municipal corporations and townships that contain at least seventy-five per cent of the county’s population.

(C) After a countywide plan approved in accordance with this section is adopted, all of the telephone companies, subdivisions, and regional councils of governments included in the plan are subject to the specific requirements of the plan and to this chapter.