; (B) shall immediately transmit a signal or message to such law enforcement agency upon activation; and (C) shall not be audible within the public school building; (3) before entering into a contract with a vendor, obtain written confirmation from the law enforcement agency or entity that conducted the independent facility security risk assessment that the improvement will mitigate a vulnerability identified in the independent facility security risk assessment; and (4) ensure that hard security improvements comply with local building code requirements and standards. 2903. Information dissemination