Application for authority to issue or assume securities shall be made in such form as the commission prescribes. Every application shall be made under oath and shall be signed and filed on behalf of the public utility by its president or by a vice-president, treasurer or other executive officer having knowledge of the matters set forth. Every application shall be placed at the head of the docket of the commission and disposed of promptly within 120 days after it is filed with the commission, unless it is necessary for good cause to continue the application for a longer time in which event the order making the continuance shall state fully the facts that make it necessary.
La. R.S. § 45:1169