Duly authorized agents of the Department of Health and Environmental Control may enter upon any premises and into any buildings or institutions for the purposes of inspection as provided for or required by State laws or regulations of the Department pursuant to such laws, but the privacy of no person shall be violated. Any person who wilfully interferes with or obstructs the officers of the Department in the discharge of any of their duties under this article shall be deemed guilty of a misdemeanor and upon conviction shall be fined not more than one hundred dollars or imprisoned not more than thirty days.