Section 5(1)(b) in The States Reorganisation Act, 1956
(b)the territories comprised in--(i)Malabar district, excluding the islands of Laccadive and Minicoy, and(ii)Kasaragod taluk of South Kanara district; and thereupon the said territories shall cease to form part of the States of Travancore-Cochin and Madras, respectively.