Lou, they do weird stuff. Here in N TX they have used 151.505 simplex, 158.400 simplex and both frequencies as a repeater input/output at various times.
They also operate on 151.400 in the Waco area even thought the license is for 159.690 and when they were in Glen Rose they had an unlicensed repeater on 153.425 with the input 160.095 licensed as a simplex base station.