The Board shall appoint an inspector at not less than $3,000 annually and with a mileage allowance that the County Commissioners determine. An individual may not qualify or continue service as an inspector if the inspector or any member of the inspector’s immediate family has a personal or financial interest, directly or indirectly, in a license, license holder, or premises licensed under this article. An inspector shall: investigate all applicants for a license or transfer of a license; inspect at unannounced times every licensed premises in the county at least once every 180 days; except as provided in subsections (d) and (e) of this section, enforce all alcoholic beverages laws with the same power as a law enforcement officer of the State; investigate all violations of the alcoholic beverages laws and report them to the Board; submit monthly reports in writing to the Board of the inspector’s activities, setting forth complaints and listing violations that the inspector observed or that were reported to the inspector; and conduct compliance checks relating to the sale of alcoholic beverages to an individual under the age of 21 years in violation of § 6–304 of this article for every licensed premises in accordance with regulations adopted by the Board. The Office of the Sheriff shall enforce violations of § 6–304 of this article. An inspector has no power of arrest. An inspector shall take the oath required by Article I, § 9 of the Maryland Constitution.