OKLAHOMA CITY (AP) - The state Senate's Democratic leader says a proposal by Gov. Mary Fallin to require motorists to pay for their vehicle tags every two years, instead of annually, might not pass the Legislature.

In her budget plan, Fallin projects the proposed switch would provide a $104 million boost to the state budget next year, as the state grapples with an expected $600 million shortfall.

It would provide Oklahoma some cash quickly, but state Sen. Andrew Rice of Oklahoma City says he could see constituents being concerned about the change and "seeing that as a type of tax increase."

Secretary of State Glenn Coffee says the proposal is a way to generate additional revenue for the state without raising taxes or fees.