RICHMOND, JUNE 13 -- State authorities today revoked the business license of a well-known Northern Virginia driving school whose owner has admitted "cheating" students of behind-the-wheel instruction required by law.

The vote by the Virginia Commercial Driving School Board, which oversees the state's 103 private driving schools, effectively closes the Chalet Driving School of Falls Church immediately.

The action, the first such sanction imposed during the state board's 21-year history, reflects the growing concern over the loosely regulated for-profit driving-school industry that is booming in the Washington suburbs. Critics complain that some schools are using unlicensed teachers or not providing the mandated 14 hours of behind-the-wheel training.

To get a driver's license, anyone under 19 must have 14 hours of in-car instruction, half driving, half observing. But in an interview printed in The Washington Post in April, Mike Chalet said he gave his average student roughly 2 1/2 hours of actual driving time. Chalet would not comment today.

Chalet said at the time that he was publicly "confessing," in part because a former student had died in a car accident and he hoped to prompt a state crackdown on the industry in general.

"If the . . . {state} wants to close my school down, I don't mind," he said then. "I'm corrupt."

After the article appeared in The Post, the Department of Commerce investigated and an independent hearing officer charged Chalet this week with failing to provide a student with the required instruction, operating the business while he had a suspended driver's license and not having the proper mirror and rooftop sign for his car.

The strongest charge stemmed from the testimony of David Perrine Jr., 16, of Annandale, who said that he had received only 30 minutes of in-car instruction before getting the certificate allowing him to obtain a driver's license.

Chalet testified at a hearing last week that he provided Perrine the required 14 hours of instruction and suggested that the youth was lying because his mother wanted a refund.

Chalet's lawyer, Robert Michael Abrams, said today that the other two counts were "technical," and noted that the state failed to produce other charges.

Despite Chalet's assertions that industry problems are widespread, Commerce Department Director Milton K. Brown Jr. said today he does not intend to open a broader probe without specific complaints.