The commission may grant any application under La. Rev. Stat. 45:1169 in whole or in part, and with such modifications and upon such terms and conditions as and may from time to time, after opportunity for hearing and for good cause shown, make such supplemental orders in the premises as it finds necessary or appropriate, and may by any supplemental order modify the provisions of any previous order as to the particular purposes, uses, and extent to which, or the conditions under which any security has been authorized or the proceeds applied.