Va. Code § 40.1-49.11

No warrant shall be executed in the absence of the owner, operator or agent in charge of the particular place, things or persons unless specifically authorized by the issuing judicial officer upon showing that such authority is reasonably necessary to effect the purposes of a law 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 employee's health or safety, 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 Commissioner and to a law-enforcement officer who shall accompany the Commissioner's representative during the execution.