La. Stat. tit. 33 § 4431
Municipalities having a population in excess of seventy thousand and less than two hundred and fifty thousand inhabitants may grant franchises for the rerouting or re-alignment or change of type of service by any public service utility, or extension thereof, occupying or using the streets, highways, bridges or public places of the city, under authority of a franchise legally granted. The extension, revision, modification or amendment to the existing franchise and the obligations imposed in connection therewith, may be granted by an ordinance passed in the same manner as all other ordinances without any election, authorization, or approval by the electors of the municipality. Any ordinance, however, granting a franchise for the rerouting or re-alignment or change of type of service of any public service utility, or extension thereof, or the extension, revision, or amendment to the existing franchise and the obligations imposed in connection therewith, shall be complete in the form in which it is finally passed and remain on file with the city secretary for public inspection at least one week before final passage and must be published once in the official journal or other newspaper published in the municipality at least one week before its final passage.
La. R.S. § 33:4431