MEMPHIS, Tenn. (AP) -- A nonprofit that campaigns against drunk driving could lose its specialty Tennessee auto license plate if more drivers don't buy them.

The Commercial Appeal reported Mothers Against Drunk Driving has until June 30 for 66 more vehicle owners to buy the plates or no more will be issued.

Tennessee Department of Revenue spokesman Billy Trout said if the specialty plates are canceled, people who already have then would be issued a standard plate at their next yearly renewal. To retain specialty plates, nonprofits must have 500 vehicle owners buy the extra cost plates. Drivers who order them pay a premium on top of the state tax and local option wheel taxes.

The sale of MADD plates provides about $15,000 annually to the organization.

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Information from: The Commercial Appeal, http://www.commercialappeal.com