This Court will not disturb a district court's decision to grant or deny a preliminary injunction unless a manifest abuse of discretion has been shown. Doe v. Cmty. Med. Ctr., Inc., 2009 MT 395, ¶ 14, 353 Mont. 378, 221 P.3d 651. Where the district court issues an injunction based on conclusions of law, those conclusions are reviewed de novo for correctness. Doe, ¶ 14. A court has the inherent power to modify or vacate an injunction as equity demands, or when the law upon which the injunction was based has changed by subsequent judicial interpretation. Jefferson v. Big Horn County, 2000 MT 163, ¶ 17, 300 Mont. 284, 4 P.3d 26.