If an applicant or registrant receives from the Department a written communication requesting a response, the applicant or registrant shall respond in writing within 30 days of the date of such communication. The Department shall send a written communication by first class mail or email to the last address or email address furnished to the Department by an applicant or registrant. It is the responsibility of an applicant or registrant to notify the Department in writing if there has been a change in the applicant’s or registrant’s address. Failure to respond as required by this regulation may be considered by the Secretary or the Secretary’s designee to be a violation of Business Regulation Article, §8.5-106, Annotated Code of Maryland.