S. 80IA : Industrial undertakings-Enterprises engaged in infrastructure development-Tribunal is right in coming to the conclusion that the permission obtained from the customs authority by the assessee vide a letter dt. 1st Feb., 2013 is deemed to be the approval granted by the competent authority of the Central Government-Entitled to deduction under S. 80IA(4)(i).[S.80IA(4)(i), 260A]