1. Article R51 of the CAS Code does not preclude an appellant from modifying in the Appeal Brief the motions for relief put forward in the Statement of Appeal. The practice of the CAS has consistently repudiated any excessive formalism and has allowed parties to modify their motions for relief on condition that the principle of equal treatment of the parties and their right to be heard be preserved. When, in compliance with Article R55 of the CAS Code, the respondent files its answer after the Appeal Brief, it cannot be affected by the appellant’s variation of his motions for relief.