If the Zoning Enforcing Officer determines that Section 151.08 has been violated, the officer shall serve a written notice upon the owner, agent or occupant of the property, notifying the owner, agent or occupant that there exists a violation of this chapter and that unless the offensive vegetation is removed within five (5) days after the date of service of the notice, the City will proceed to remove the offensive vegetation and assess the costs against the owner. Notice is served by personally delivering the notice to the owner, agent or occupant, by leaving the notice with any adult resident at the location where the offense exists, or by mailing the notice to the owner, agent or occupant by certified mail, return receipt.