Yeah, back before I was a "geezer" and fishing tournaments in Texoma I had to buy the special Texoma license. That was so you could fish on the Texas side without having to buy an "out of state" license (which cost more.) The reciprocal agreement covers all lakes in both states. I've fished Ray Bob and Grapevine Lake since that was in effect and was checked at Grapevine. All I had to do was show an id from Oklahoma showing I was over 65.