BATON ROUGE, La. (AP) - Louisiana's digital driver's license app can now be used as identification to buy beer, liquor, and cigarettes.

A new rule published by the Louisiana Office of Alcohol and Tobacco Control authorizes the LA Wallet cellphone app for age verification. LA Wallet launched last July, under a 2016 law. While it's free to download, it takes a $5.99 purchase to use the app for legal identification.

The app enables cellphones to display an image of the physical driver's license, the only form of electronic identification recognized and accepted in Louisiana. NOLA.com/The Times-Picayune reports that under the new ATC rule, retailers must train employees before they start accepting the digital driver's license for alcohol and tobacco purchases.

Retailers also still will have the right to ask for a physical form of identification.