Except as provided in section 642, an officer required to be elected at the odd year general election must be nominated at the odd year primary election. If a charter provides for nomination by caucus or by filing a petition or affidavit directly for the general election, the candidate filing deadline or certification deadline is 4 p.m. on the fifteenth Tuesday before the odd year general election. If a charter provides for the election at the primary of a candidate who receives more than 50% of the votes cast for that office, the candidate filing deadline or certification deadline is 4 p.m. on the fifteenth Tuesday before the primary.