La. Stat. tit. 13 § 4723
When the name of the lessees, tenants, or other occupants of any gambling house as defined in R.S. 13:4721 is not known, the action to abate the nuisance created shall be brought against the person in whose name the said property stands on the assessment books of the parish in which the nuisance is situated at the time the action is filed, and such person shall be deemed to be the owner thereof for the purposes of this Sub-part. Any such owner made defendant as herein provided may, however, without delaying the trial of the action and within three days of being cited (counting Sundays, half-holidays and legal holidays) file an answer impleading the lessees or tenants actually responsible for the maintenance of the nuisance; and on proof that such owner is not implicated in the maintenance of the nuisance, he shall be dismissed with costs.
La. R.S. § 13:4723