Section 86E. The chief of the fire department or any person designated by him may, at all reasonable hours, enter into buildings within their jurisdiction where horses or mules are stabled, or upon premises adjacent thereto, for the purpose of enforcing sections eighty-six A to eighty-six D, inclusive, and if any such official or person so authorized finds the existence of conditions likely to cause a fire in such buildings or on such premises, he shall order such conditions to be remedied. Such order shall be served by delivering the same in hand or by posting the same in a conspicuous place on the building or premises affected thereby.