Any violation of any existing laws of the City and County of San Francisco, shall constitute and shall be so construed as to be sufficient reason for the revocation of any permit. Any permit issued pursuant to the provisions of Sections 460 to 466, inclusive, of this Article, may be revoked by the Department of Public Health for cause upon application of any one or more of the Departments or Bureaus whose approval was first necessary for the issuance of the permit, after due hearing shall be first had therein; and reasonable notice shall be given to the person, firm or corporation charged with the said violation, and of the time, place and date set for the hearing on the revocation of said permit.