H. No. 272 / 57 OG No. 48, 8603 (November 27, 1961)
"Eight judges shall be commissioned for the First Judicial District. Three judges shall preside over the Courts of First Instance of Cagayan, Batanes and the Subprovince of Apayao in the Mountain Province, and shall be known as judges of the first, second, and third branches thereof, respectively, the judge of the first branch to preside also over the Court of First Instance of the Subprovince of Apayao and the judge of the second branch to preside also over the Court of First Instance of Batanes; three judges shall preside over the Court of First Instance of Isabela, and shall be known as the judges of the first, second and third branches thereof; and two judges shall preside over the Court of First Instance of Nueva Vizcaya, to be known as the judges of the first and second branches thereof."
"For the First Judiciary District, the judge of the first branch of the Courts of First Instance of Cagayan, Batanes and the Sub-province of Apayao in the Mountain Province, shall be stationed in the Municipality of Tuguegarao, Province of Cagayan, the judge of the second branch, in the Municipality of Aparri, same province; the judge of the third branch, in the Municipality of Tuao, same province; two judges shall be stationed in the Municipality of Ilagan, Province of Isabela; one judge shall be stationed at Cauayan, Isabela; and two judges, in the Municipality of Bayombong, Province of Nueva Vizcaya."
"First Judicial District: At Santo Domingo de Basco, Province of Batanes, on the first Tuesday of March of each year. A special term of court shall also be held once a year in the Municipality of Ballesteros, Province of Cagayan."