(a) Subject to subsection (b) of this Code section, the commission shall have the power and authority to allocate any utility service in such manner as it deems proper in order to protect the public health, safety, or welfare, including for such purposes the power and authority to alter, amend, suspend, or terminate any existing rate, schedule, contract, rule, or regulation affecting such utility service and to prescribe new or additional rates, schedules, contracts, rules, or regulations affecting such utility service, provided that in any event such rates, schedules, contracts, rules, or regulations as are altered, amended, or prescribed by the commission shall be just and reasonable.

(b) Before the commission may exercise the power and authority granted by subsection (a) of this Code section, it must:

(1) Find, after a hearing respecting the manner, if any, in which the commission should exercise such power and authority, as well as the necessity therefor, such hearing to be initiated by the commission on its own motion or by any person and to be preceded by notice to the persons affected, that there exists a shortage in the quantities of such utility service available in this state or in any portion of the state, or that such a shortage is imminent, and that it is necessary for the commission to exercise such power and authority in order to protect the public health, safety, or welfare; or

(2) Find that an emergency exists with respect to the quantities of such utility service available in this state or in any portion of the state, and that it is necessary for the commission to exercise such power and authority in order to protect the public health, safety, or welfare before notice and hearing can be afforded to the persons affected; provided, however, that the directives, rulings, and orders of the commission respecting such utility service based upon a finding that an emergency exists pursuant to this paragraph shall be temporary and provisional and the commission shall, as soon as practicable under the circumstances, afford notice and hearing to the persons affected as to whether such directives, rulings, or orders of the commission shall be continued, modified, made permanent, or otherwise affected.