Section 29Omnibus Election Code of the Philippines (Batas Pambansa Blg. 881), Sec. 29

Regular elections of local officials. - The election of provincial, city and municipal officials whose positions are provided for by the Local Government Code shall be held throughout the Philippines in the manner herein prescribed on the first Monday of May, Nineteen hundred and eighty-six and on the same day every six years thereafter.

The officials elected shall assume office on the thirtieth day of June next following the election and shall hold office for six years and until their successors shall have been elected and qualified.

All local incumbent officials whose tenure of office shall expire on March 23, 1986 shall hold office until June 30, 1986 or until their successors shall have been elected and qualified: Provided, That they cannot be suspended or removed without just cause.