"What makes you nervous about this bill is when you talk about blood, you cringe," Gingery told the committee before the vote.

Law enforcement agencies and their representatives were solidly in favor of the bill.

Casper Police Chief Tom Pagel said the city of Casper has spent thousands of dollars trying to curb the incidence of drunken driving through education and other campaigns. He said the tipsy taxi program cost $42,000 for 3,000 free rides home from bars or parties last year.

Last year the city arrested 650 drivers with blood-alcohol concentration levels of more than .15 percent, which is more than twice the legal limit of .08 percent. In Natrona County, the number was 1,200.

"We still have a problem," Pagel said. "You are dealing with an individual who has chosen to be irresponsible."

"It is time for us to take drunk driving seriously," he added.

Eric Phillips, Wyoming Traffic Safety Resources prosecutor who works with law enforcement, said there have been no challenges so far to South Dakota's law.

South Dakota, he said, has done away with implied consent.