A Staten Island man is the first to plead guilty under a tough new drunk driving law that went into effect Friday.

According to District Attorney Dan Donovan, repeat offender Bernardo Gonzalez, 41, is required under Leandra's Law that he install an ignition interlock device – which prevents a car from starting if the driver is impaired.

Gonzalez also faces 60 days in jail.

Leandra's Law is named for an 11-year-old girl, Leandra Rosado, who killed in an October car crash on the Henry Hudson Parkway.

Investigators say the driver, her friend's mother, was drunk.

Mayor Michael Bloomberg presented a proclamation in Downtown Manhattan Friday to Rosado's father Lenny, who had fought successfully for a tougher drunk driving law after her death.

"She made a difference. Her death made a difference. It wasn't in vain," said Lenny Rosado. "And I'm going to hang this up right on her wall. This is going to be about her, about Leandra. Not about me."

Leandra's Law is one of the harshest drunk driving laws in the country. It makes it a felony to drive drunk with a child age 15 or younger in the car.