(a) The agent is hereby designated to administer the provisions of this chapter on behalf of the board and shall approve or disapprove plats under the terms of this chapter. In the performance of his duties, the agent may request verbal or written opinions or decisions from other departments or agencies considering the details of any submitted plat. This authority regarding opinions and decisions shall have particular reference to the department of transportation and the health department.

(b) The agent, on behalf of the board, may institute, or cause to be instituted, any appropriate action or proceeding against any subdivider or other person who fails or refuses to comply with the provisions of this chapter.

(c) All departments, officials and public employees of the county who are vested with the duty or authority to issue permits or approvals under this chapter shall adhere and conform to the provisions of this chapter. Any such approvals or permits issued in conflict with the provisions of this chapter shall be null and void.