Labor Laws, Licensing & Prevailing Wages
NFPA 730: Guide for Premises Security recommends either wire mesh embedded into the glass or bullet-resistant film or all exterior windows, exterior doors with glass, and exterior sidelights.
NFPA 730 does not provide recommendations for interior doors, interior windows, or interior sidelights.
Federal law dictates that each state is responsible for the code requirements of a state and/or municipality/city. Some states have a state code that each municipality/city must adhere to.
In addition, each municipality/city may have supplementary requirements. Some states (i.e. Missouri) have a state code for state buildings, but allow each municipality/city to decide which codes are valid within that municipality/city.
While this may seem confusing, a school district should conduct an online search of municipality/city codes. From there, the district will quickly discover whether the municipality/city has a unique code or whether the municipality/city is under the requirements of a state code.
Online resources such as www.municode.com have up-to-date lists of all municipality/city codes.