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COLUMBIA, S.C. (AP) -- South Carolina Gov. Nikki Haley has signed a law requiring more people convicted of driving under the influence to install a device that won't let their vehicles start if the drivers have been drinking.

Haley's spokesman Doug Mayer said the governor approved the bill Monday. She plans to hold a signing ceremony later for Emma's Law.

The law requires anyone with a first conviction for DUI with a blood-alcohol content of 0.15 percent or greater to get an ignition interlock device for six months. The device tests a driver's breath and won't start if it detects a blood-alcohol level of 0.02 percent or greater.

The lock would go in place for two years for a second conviction with a blood-alcohol level of 0.08 percent, the state's legal limit.

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