In this chapter, the following terms have the meaning indicated. Terms Defined. “Local school system” means any of the 24 local public school systems in the State. “School emergency plan” means a plan for each public school grounds within the local school system that addresses mitigation, prevention, preparation, response, and recovery to an emergency including responding to: Violent or traumatic events on school grounds during regular school hours or during school-sponsored activities; or Events in the community that affect normal school functioning. “Central administration emergency plan” means a plan for each local school system and the SEED School that addresses mitigation, prevention, preparation, response, and recovery to an emergency including responding to: Violent or traumatic events on school grounds during regular school hours or during school-sponsored activities; or Events in the community that affect normal school functioning. “Drill” means a formalized exercise by which school system personnel, school staff, or students rehearse the plan or portions of the plan. “Mitigation” means a preventative action taken to reduce the loss of life or damage to property from all hazards. “Public school grounds” means local school system owned or leased buildings, the SEED School, and the land that surrounds the school building. “SEED School” means the residential boarding education program operated under the supervision of the Department.