Whenever, in the opinion of the Code Enforcement Officer, in the case of the use of any building or land, or the Building Official in the case of work on any building or structure, after proper examination and inspection, there appears to be a violation of any provision of this chapter, or of any rule, condition or requirement established pursuant thereto, he shall, on his own initiative, serve a written notice of the alleged violation upon the owner of the property, the owner's agent or the persons performing the work. Such notice shall inform the recipient of the nature and specific details of such alleged violation and the date of compliance by which the alleged violation shall be remedied or removed, which date shall be not less than 20 calendar days from the date of service or such additional time as deemed necessary by the Code Enforcement Officer or, as may be applicable, the Building Official. Service shall be by registered mail addressed to the owner as set forth on the latest assessment roll or the address on the application for building permit or other Town approval. Service shall be considered completed either upon depositing said notice in a stamped envelope in a mailbox maintained by the United States Postal Service or upon personal service.