The Town Manager or his designee and, when appropriate, the County Health Officer and his assistants shall have the right to enter upon private premises for the purposes specified in Section 107-6, upon compliance with all applicable provisions of law. [Unless it appears probable that advance warning would defeat the purpose of such entry, occupants or premises to be entered shall be given reasonable notice in advance, and in any case it shall be unlawful for any owner or occupant to prevent such entry which is sought to be made in compliance with law.]