SECTION 3.9  APPROVAL OF PETITIONS.
   The clerk shall accept only nomination petitions which conform substantially with the forms provided by him and which contain the required number of valid signatures for candidates having those qualifications required for the respective elective city offices as set forth in this charter.  The clerk shall forthwith after the filing of the petitions notify in writing any candidates whose petition is then known not to meet the requirements of this section, but the failure to so notify any candidate shall in no way prevent a final determination that the petition does not meet such requirements.
   Withdrawal of a candidate's name from consideration on the ballot must be made in writing and in conformance with the time allowed by statute.