The 'Alleppey Diocese' was erected by the Papal Bull 'Ea Redemptoris Verba' of Pope Pius XII, dated June 19 ,1952 which divided the northern territory of the old Cochin Diocese at the Kuthiathodu Canal Line . the territory to the north of that line belongs to the Cochin Diocese and that to the south of it, to the Diocese of Alleppey.The executorial Decree of September 8 ,1952 assigned to each of the Diocese of Alleppey and Cochin a supplementary personal jurisdiction over certain parishes in the territory of the other. This Decree was approved by the Sacred Congregation for the Propagation of the Faith on September 24,1952 and become effective on October 11,1952.