NASHVILLE, Tenn. (AP) — A little-known Tennessee law banning bars and stores from including beer brands or sales on outside signs could be unconstitutional.

State Attorney General Herbert Slatery says in a legal opinion that it’s unlikely the law would survive a legal challenge on free speech grounds because it bans “truthful and non-misleading commercial messages about lawful products.”

Slatery also notes that beer retailers are allowed to display information about available beer brands and drinks promotions in other ways such as window displays. He adds that exceptions for people with temporary beer permits, stadiums and entertainment complexes also raise questions about whether the state can make a consistent argument about promoting public health and safety.

Republican Rep. Ryan Haynes of Knoxville says he requested the opinion on behalf of a constituent.

Note: The full opinion is HERE.