Candidates for any elective office, to be voted for at any Municipal election under the provisions of this Charter, shall be nominated at a primary election, and no other names shall be placed on the election ballot for the election of such officers, except those nominated in the manner hereinafter prescribed, provided, however, that whenever the number of candidates for nomination to any office does not exceed twice the number to be elected to that office, then in such case no primary election for the nomination of candidates for such office shall be held, and such candidates shall be deemed to be nominated to such office, and the names of such candidates for any such office shall be placed on the election ballot to be voted for at the next regular Municipal election, the same in all respects as though the said candidates had been nominated at a primary election.