(a) Notwithstanding any other law, if the Administrator determines that a pollution source or combination of sources is creating an imminent and substantial endangerment to the public health, welfare or the environment, the Administrator, with the concurrence of the Governor, shall order any person causing, or contributing to the release of any air pollutants or combination of air pollutants, to immediately reduce or discontinue the release. Any order under this Section shall fix a place and time, not later than seventy-two (72) hours thereafter, for a hearing to be held before the Agency.

(b) If the Administrator finds that emissions from the operation of one (1) or more air pollution sources is causing imminent danger to human health or safety, he or she may order the person responsible for the operation in question to immediately reduce or discontinue emissions, without regard to the provisions of § 49111 of this Chapter. In such event, the requirements for hearing set forth in Subsection (a) of this Section shall apply.

(c) Nothing in this Section shall be construed to limit any power, which the Governor or any other officer may have to declare an emergency and act on the basis of that declaration, if that power is conferred by statute or constitutional provision, or inheres in the office.