Construction: code; safety guidelines for lockdown procedures of a school building and installation of emergency responder radio coverage systems in K-12 educational facilities; require. Amends title of 1937 PA 306 (MCL 388.851 - 388.855a) & adds secs. 1e & 3a.

HB 4224 requires all Michigan K-12 public and private schools to install emergency responder radio coverage systems within 10 years if they lack them, ensuring these systems integrate with statewide public safety communications and cover all building areas. It also mandates the state to create and publish safety guidelines for school lockdown procedures within 90 days, including how fire codes impact lockdowns and evacuation plans. These guidelines must align with existing construction and fire safety codes. The bill directly affects every K-12 school building in Michigan and requires coordination with state agencies like the Michigan State Police and fire marshals for implementation.