(b) The school district may install a door security locking means on a door of a school building to prevent unwanted entry through the door if all of the following requirements are met: (1) The door security locking means can be engaged without opening the door.(2) The unlocking and unlatching of the door security locking means from the occupied side of the door can be accomplished without the use of a key or tool.(3) The door security locking means complies with all applicable State and federal accessibility requirements.(4) Locks, if remotely engaged, can be unlocked from the occupied side.(5) The door security locking means is capable of being disengaged from the outside by school district employees, and school district employees may use a key or other credentials to unlock the door from the outside.(6) The door security locking means does not modify the door-closing hardware, panic hardware, or fire exit hardware.(7) Any bolts, stops, brackets, or pins employed by the door security locking means do not affect the fire rating of a fire door assembly.(8) School district employees are trained in the engagement and release of the door security locking means, from within and outside the room, as part of the emergency response plan.(9) For doors installed before July 1, 2019 only, the unlocking and unlatching of a door security locking means requires no more than 2 releasing operations. For doors installed on or after July 1, 2019, the unlocking and unlatching of a door security locking means requires no more than one releasing operation. If doors installed before July 1, 2019 are replaced on or after July 1, 2019, the unlocking and unlatching of a door security locking means on the replacement door requires no more than one releasing operation.(10) The door security locking means is no more than 48 inches above the finished floor.(11) The door security locking means otherwise complies with the school building code prepared by the State Board of Education under Section 2-3.12. The school district may install a door security locking means that does not comply with paragraph (3) or (10) of this subsection if (i) the school district meets all other requirements under this subsection and (ii) prior to its installation, local law enforcement officials, the local fire department, and the board agree, in writing, to the installation and use of the door security locking means. The school district must keep the agreement on file and must, upon request, provide the agreement to the State Board of Education. The agreement must be included in the school district's filed school safety plan under the School Safety Drill Act.