NORMAN — Part of Oklahoma's preparation this week is to find out if flashing a "Horns down" is worthy of a penalty.

The hand gesture has long been part of the OU-Texas rivalry, but West Virginia receiver David Sills V was flagged in a game against Texas for turning his hands into the upside-down Longhorns logo.

Riley and his team need to know if "Horns down" will be an acceptable gesture at 11 a.m. Saturday when OU takes on Texas in the Big 12 title game.

"We’re working on some clarification but I will make sure it’s fully clear to our guys what they can and can’t do," Riley said Monday.