Each person applying for or renewing a firm registration certificate shall maintain a current liability insurance policy that includes blasting coverage, in the minimum amount of one million dollars ($1,000,000) during all blasting operations, for the use and benefit of any person who may be injured or aggrieved by wrongful act or omission of any employee, servant, officer, or agent in the conduct of business of the blaster, or the blaster itself. If the insurance policy ceases to be in effect, the firm registration certificate shall become invalid. This requirement shall not be construed so as to require employees and/or blasters to maintain such insurance coverage. This section shall not be applicable to any governmental entity, as defined in the Tennessee Governmental Tort Liability Act, compiled in title 29, chapter 20.