City officials say the rules and regulations to implement the law took effect Monday, adding the District to six states that authorize the practice.

The move comes a week after a U.S. House panel voted largely on party lines to advance a measure that would repeal the city’s Death With Dignity Act. That language must be approved by the full House and Senate, and by President Trump, before it can take effect.

The assisted-suicide law, passed 11 to 2 last year by the D.C. Council after more than a year of debate, is the latest District measure targeted by federal lawmakers, who have previously moved to block needle exchanges, the legalization of marijuana and abortion subsidies for low-income women.