Effective Monday, county and State Police on Long Island are joining law enforcement agencies across the country in cracking down on drivers who don't buckle up and don't have their young passengers properly restrained.

The Buckle Up New York campaign is being coordinated in conjunction with the governor's Traffic Safety Committee.

Suffolk police are promising "numerous checkpoints and saturation patrols" during the seat-belt crackdown through June 2.

Nassau police, along with 17 village and city police departments, will be enforcing seat-belt laws "around the clock," Nassau County Executive Edward Mangano said in a release.

State laws require:

Front-seat occupants age 8 or older to be buckled in, as well as backseat passengers 8 through 15.

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Children younger than 4 to be restrained in a federally approved safety seat.

Children 4 to 7 to be restrained in an appropriate child-restraint system, which does not include a regular seat belt.