La. Stat. tit. 38 § 1762
Upon the failure or refusal of the police juries to organize a gravity drainage district when needed of territory composed partly of the parishes of each, they are hereby required to form the gravity drainage district when petitioned so to do by property owners as is provided for in R.S. 38:1751 governing the creation of gravity drainage districts from lands of one parish. The police juries shall form gravity drainage districts within the parishes when petitioned in the manner provided in R.S. 38:1751, and shall create, or shall approve the creation of gravity drainage districts composed of lands situated in two or more parishes, in the manner as provided in R.S. 38:1760, upon there being presented to the police juries a petition signed by the requisite number of property owners as provided for in R.S. 38:1751, governing the creation of gravity drainage districts from the lands of one parish. The fact that there may be presented to any police jury, or juries, a petition objecting to the creation of the gravity drainage district, or districts, shall not be just ground for the police jury or juries refusing to create or approve the creation of the gravity drainage district or districts when thus petitioned.
La. R.S. § 38:1762