Abatement costs, late payment charges, reinspection fees, or other fees or charges imposed under the IPMC, shall be paid within 30 calendar days of imposition of the fees. The City Council may order that the said charge be imposed as a special assessment against the real property involved. If the Council orders that the charge be assessed against the property, it shall impose the assessment by ordinance, cause the same to be entered in the docket of City Liens, and thereafter the said assessment shall constitute a lien against said property, enforceable in the same manner as liens for street improvements and shall bear interest at the rate specified in section 3.470(2) of the Medford Code, beginning 15 days after the entry of the lien in the lien docket.