La. Stat. tit. 51 § 424
In addition, the courts of this state may prevent and restrain violations of this Subpart, and district attorneys, in the respective districts, shall institute proceedings to prevent and restrain violations. Any person damaged, or who is threatened with loss or injury by reason of a violation of this Subpart may sue for and have injunctive relief against any damage, or threatened loss or injury. Any person, successful in a suit for injunctive relief under this Section, shall be allowed a reasonable attorney's fee; and further, the right as herein established shall exist in favor of any duly organized and existing trade organization and there shall exist damages and injury to such organization where it is shown that any one or more individual members thereof has been damaged by a violation of this Subpart.
La. R.S. § 51:424