The term “elector” or “voter” when used in this Charter means a person who is a resident of the city and who is entitled to vote for candidates for municipal office in a municipal election under the Constitution and statutes of New Mexico as amended and supple- mented from time to time and who is registered pursuant to the applicable statutes of New Mexico as amended and supplemented from time to time or who is registered pursuant to any ordinance of the Council which expressly provides that it is to take precedence over such statutes and which is enacted after the effective date of this Section.