If the owner and manager of a residential unit, child care facility, or school fails or refuses for any reason to comply with a lead hazard control order issued under section 3742.37 of the Revised Code, the director of health or board of health that issued the order shall issue an order prohibiting the owner and manager from permitting the unit, facility, or school to be used for any purpose until the unit, facility, or school passes a clearance examination. On receipt of the order, the owner or manager shall take appropriate measures to notify each occupant, in the case of a residential unit, and the parent, guardian, or custodian of each child attending the facility or school, in the case of a child care facility or school, to vacate the unit, facility, or school until the unit, facility, or school passes a clearance examination. The director or board shall post a sign at the unit, facility, or school that warns the public that the unit, facility, or school has a lead hazard. The sign shall include a declaration that the unit, facility, or school is unsafe for human occupation, especially for children under six years of age and pregnant women. The director or board shall ensure that the sign remains posted at the unit, facility, or school and that the unit, facility, or school is not used until the unit, facility, or school passes a clearance examination.