Where a party has been granted exclusive rights to conduct safaris in a defined geographical area under a valid contract, and those exclusive rights are not clearly limited by unambiguous contractual language to specific categories of quotas, the party has a prima facie right to prevent other parties from conducting safaris in that area, even if the competing claim is based on a special government quota. For an interim interdict, the applicant need only establish a prima facie right (not proof on a balance of probabilities), and where the contractual provisions are disputed by both parties, this demonstrates the existence of a prima facie right. An award of damages is not an adequate alternative remedy where the injury is a continuing violation of contractual rights and damages would be difficult to assess due to information asymmetry.