A licensee shall be familiar with and comply with the laws and regulations governing the provision of stationary engineer services. An applicant who has successfully completed a license examination shall apply for licensure, and pay all applicable fees, within 2 years of successfully completing the license examination in order for the applicant’s test results to remain valid. If a boiler certification is required, a licensee shall: Display conspicuously a current and valid license of each individual assigned to oversee a boiler: Near the regulated machinery; or With the certificate of inspection for the regulated machinery; Affix a current photograph to the license; and Have available at all times valid government-issued photographic identification. If an applicant or licensee receives from the Board a written communication requesting a response, the applicant or licensee shall respond in writing within 30 days of the date of the mailing. The Board shall send a written communication by first-class mail to the last address furnished to the Board by the applicant or licensee. It is the responsibility of an applicant or licensee to notify the Board in writing if there has been a change in an applicant’s or licensee’s address. Failure to respond as required by this regulation may be considered by the Board to be a violation of Business Occupations and Professions Article, §6.5-314(a)(1)(ix), Annotated Code of Maryland. Business Occupations and Professions Article, §§6.5-205, 6.5-304, 6.5-305, 6.5-306, 6.5-311, and 6.5-314(a)(1)(iv), Annotated Code of Maryland Effective date: August 5, 2013 (40:15 Md. R. 1229) Regulation .02 amended effective May 22, 2017 (44:10 Md. R. 472) Regulation .04 adopted effective February 25, 2019 (46:4 Md. R. 190)