Fair enough, I was basing my comment on some commentators lamenting rule changes and Wiggins, Cav and Froome not being in any track events following the disappointing road race. I really should know better than to accept what commentators say at face value.
I think what Boardman and Cav himself have commented on is the rules that the UCI have in place in regards to competing in the different disciplines.
As Cav has said, he can't enter track events because he hasn't competed in a World Cup event in the last two years. However, track cyclists can compete in a road race, despite having not completed in any events to qualify for it, which was the case for one rider in the Olympic Road Race last week.
I think Cav is being a bit green eyed though. He obviously enjoyed the track, and I think being in the Velodrome and seeing Team GB do so well has reignited his interest. There is also the aspect that he still wants an Olympic Medal and having missed out, he thinks he could have got one on the track. He's concentrated his career for a good number of years now on the road and he did acknowledge himself that the pool they are using for team sprint are amazing riders who worked hard to be selected. So it's not like he could necessarily just expect to come in, despite being an amazing sprinter on the road and his past track ability.