any retired elective provincial city or municipal official who has received payment of the retirement benefits to which he is entitled under the law , and who shall have been 6,5 years of age at the commencement of the term of office to which he seeks to be elected shall not be qualified to run for the same elective local office from which he has retired ( emphasis supplied ) petitioner dumlao alleges that the aforecited provision is directed insidiously against him , and that the classification provided therein is based on `` purely arbitrary grounds and , therefore , class legislation . ''