The Council may suspend, for a period not exceeding 60 days, or revoke any license or permit for violation of any provision of law, ordinance, or regulation applicable to the licensed or permitted activity or property. Except where mandatory revocation is provided by law without notice and hearing and except where suspension may be made under the law without notice and hearing, no suspension or revocation shall be enforced until the licensee or permittee has been given notice of the alleged violation and has been given the opportunity to be heard at a public hearing.