No warrant shall be executed in the absence of the owner, operator or agent in charge of the particular building, structure, property or premises unless specifically authorized by the issuing judicial officer upon showing that such authority is reasonably necessary to effect the purposes of a statute or regulation being enforced. An entry pursuant to this warrant shall not be made forcibly, except that the issuing officer may expressly authorize a forcible entry (i) where facts are shown sufficient to create a reasonable suspicion of an immediate threat to an occupant of the particular building, structure, property, or premises, or, to the general safety and welfare of the public, or, to adjacent buildings, structures, properties or premises, or (ii) where facts are shown establishing that reasonable attempts to serve a previous warrant have been unsuccessful. If forcible entry is authorized, the warrant shall be issued jointly to the fire official and to a law-enforcement officer who shall accompany the fire official during the execution.