• Ban bump stocks. Bump stocks are devices that can be attached to rifles to enable them to fire faster, and they will no longer be legal in Florida if the bill is signed. (You can learn more about them here.) They came to public attention in October, after a gunman in Las Vegas used them to kill 58 people and wound hundreds; with the devices, his semiautomatic weapons were able to fire almost as fast as fully automatic machine guns. After that massacre, the N.R.A. said it supported a national ban on bump stocks, an extremely rare gun control endorsement by the group. But the proposal languished in Congress, and while President Trump told the Justice Department last month to issue new regulations, thus far it has not.

• Arm school employees. Perhaps the most controversial provision of the bill is one that would allow superintendents and sheriffs to arm school personnel — a measure not requested by the Parkland students but long desired by the N.R.A., which argues that gun-free zones prevent people from defending themselves in an attack. Specifically, the bill would create a $67 million “marshal” program under which certain employees — including counselors, coaches and librarians, but not full-time classroom teachers — could be trained and armed. (The program would be voluntary.) Under an amendment successfully proposed by State Senator Randolph Bracy, a Democrat, these employees would first have to undergo 12 hours of diversity training.

• Fund school security. The bill allocates millions of dollars to make buildings more secure and to hire more school-based police officers. However, when the Parkland shooting happened, an armed school resource officer was present, standing by the door to the building, and did not enter. (The officer, Scot Peterson, resigned from the Broward County Sheriff’s Office after his actions were called into question; Sheriff Scott Israel said at a news conference last month that he should have gone into the building and confronted the gunman. Mr. Peterson later said he acted the way he did because he thought the gunfire was coming from outside.)

• Expand mental health services and regulations. Florida school districts would receive state funding to provide mental health care to students. Additionally, the bill would allow the police to temporarily confiscate guns from anyone subject to involuntary psychiatric evaluation under Florida’s Baker Act. It would also prohibit gun sales to Floridians who were committed to mental institutions or deemed mentally incompetent by a judge, and would allow the police — with judicial approval — to bar a person deemed dangerous from owning guns for up to a year.