Concession contract for the exploration, development and production of oil and natural gas containing an arbitration clause. Controversy regarding the disposability of the right that is the subject matter of the arbitration. Lawsuit filed seeking a declaration of the non-disposability of the right in view of subsequent administrative proceedings of the ANP. Grounded on article 25 of the Brazilian Arbitration Act, given that the contract was executed prior to the repeal of that provision by Law 13,129/2015. Dismissed. Prevalence of the Kompetenz-Kompetenz principle, provided for in articles 8, sole paragraph, and 20 of the Brazilian Arbitration Act: