The One-Call Notification System Act shall not affect or impair any local ordinances or other provisions of law requiring permits to be obtained before an excavation. A permit issued by a governing body shall not relieve an excavator from complying with the requirements of the act. No claim shall be maintained under the One-Call Notification System Act against a political subdivision or its officers, agents, or employees except to the extent, and only to the extent, provided by the Political Subdivisions Tort Claims Act.