Those persons holding the offices of Mayor and Councilmembers at the time of the initial adoption of this Charter shall continue as Mayor and Councilmembers, until the first regular meeting in April following the 1993 general election. Nothing in this section shall prohibit those holding office, at the time for filing for the 1993 election, from becoming a candidate for the office of Councilmember from their respective, newly created wards or for Mayor at large.