La. Stat. tit. 15 § 810
In any parish in which there is presently located a prison, correctional institute or any other type of prison facility which is operated by the governing authority of the parish, the governing authority may make the said prison facilities under its jurisdiction and operation available to one or more other parishes on a per prisoner fee basis.
When any such parish governing authority does exercise its option to make any such prison facility so available, then the said prison facility shall not in any way come under the requirements of this part but it will be a multiparish prison, particularly for the purpose of receiving and working persons sentenced to imprisonment in said multiparish prison and such sentencing is hereby authorized for all misdemeanors and all offenses which are not capital and which are not necessarily punishable at hard labor.
La. R.S. § 15:810