Taking the Red River Rivalry one step further...

Quoted: Carolyn Beck, a spokeswoman for the Texas Alcoholic Beverage Commission, said that under state law, if a vendor sells an alcoholic beverage to someone under 21, the vendor has not violated the law if the person buying the alcohol presented what appeared to be valid Texas identification. That same protection does not apply if the purchaser presented out-of-state identification, leading to reluctance on the part of some vendors to sell to anyone showing out-of-state identification, Beck said.