It’s been one year since a gunman opened fire inside a Midtown office building, killing four people before taking his own life.

Now, a new city law is officially in effect honoring one of the victims and creating new protections for security officers across New York City.

The Aland Etienne Safety and Security Act is named after the security officer who was killed at 345 Park Avenue while trying to shut down the building’s elevators to prevent the gunman from reaching upper floors.

The four victims were Wesley Lepatner, a mother of two and senior managing director at Blackstone; Julia Hyman, a 27-year-old associate at Rudin Property Management; Didarul Islam, an off-duty NYPD officer and father of two with another child on the way; and Etienne, a father of four who worked as a security officer in the building.

Etienne’s partner, Rachelle Paoli, testified before the City Council in October in support of the legislation.

“Aland made the ultimate sacrifice choosing bravery and selflessness over fear,” she said. “Pass the Aland Etienne Safety and Security Act so that the security officers across the city that put their life on the line every day are ensured the quality of life like Aland had.”

The law will increase the minimum wage for city security officers to $22.20 an hour in January, according to SEIU Local 32BJ, which represents about 20,000 security officers across the city. Some security officers currently make the minimum wage of $17 an hour.

The measure also requires employers to provide health benefits and paid time off.

Manny Pastreich, president of SEIU Local 32BJ, told NY1 the law recognizes the risks security officers take every day.

“When they leave their spouses, their kids, they know there’s a risk. And we can’t take away that risk, but we can make sure that they’re being respected in terms of the pay, that they’re being respected in terms of the benefits that they earn,” Pastreich said.

The law marks the first time since 1964 that New York City has passed a private sector minimum wage law.

Pastreich said increasing pay and benefits could help reduce turnover and keep experienced security officers in the field.

“When you raise pay and benefits you’re going to reduce turnover, make sure all that training has more value,” he said.

The law took effect on the anniversary of the shooting, which Pastreich said is a fitting tribute to Etienne’s life and legacy.

“He’s remembered as a hero by his family. He’s remembered as a hero by this union. I know the incredible amount of respect that the tenants in that building had for him and still have to honor his legacy,” Pastreich said.