The Building Inspector shall give written notice, by registered or certified mail, to the owner and tenants of the property upon which the alleged violation occurs, describing the particulars of the alleged violation and the reasons why it is believed that there is a violation in fact, and shall require an answer or correction of the alleged violation to the satisfaction of the Building Inspector within a reasonable time limit set by said Inspector. The notice shall state, and it is hereby declared, that failure to reply or to correct the alleged violation to the satisfaction of the Building Inspector within the time limit constitutes admission of a violation of this chapter. The notice shall further state that, upon request of those to whom it is directed, technical determinations of the nature and extent of the violation as alleged will be made and that, if a violation as alleged is found, costs of the determinations will be charged against those responsible, in addition to such other penalties as may be appropriate, and that, if it is determined that no violation exists, costs of determination will be borne by the City.