ATLANTA -- Georgia drivers should find out in two weeks whether falling gas prices will shave some money off the sales tax on motor fuels.

One of the state's two taxes on gas, the sales tax is set every six months. Right now, the tax is at 11 cents a gallon, where it was set on Jan. 1. Gov. Sonny Perdue froze an increase of 2.9 cents per gallon that was set to kick in July 1.

Gas prices have been extremely volatile, dropping dramatically in October and November after soaring in September. The Georgia Department of Revenue will announce the new rate Dec. 1, a spokesman for the department said. It will take effect at the beginning of the new year.

The sales tax on motor fuel is prepaid by gas stations and then tacked onto the price consumers pay at the pump.