SECTION 1. Act Numbered Thirty-one hundred forty-three is amended by adding after section five thereof a new section, to be known as section 5-A, which shall read as follows:
"SEC. 5.-A. Within thirty days after the approval of this amendatory Act, the Sub-province of Siquijor shall b constituted and organized into a separate, independent and regular highway engineering district similar to existing engineering districts, for which a district engines shall be assigned in accordance with the laws, rules and regulations applicable thereto."