Off the TBS website
Probably WAY too much information based on your question and it may require a little legwork to break down the dates but hey, thats what your there for...
Oh heck I am a little bored right now so...
Alpha: 28 Nov 2005 - 09 June 2006
Bravo: 09 Jan 06 - 07 July 06
Charlie: 10 April 06 - 6 Oct 06
Delta: 19 June 06 - 15 Dec 06
Echo: 10 July 06 - 19 Jan 07
Fox: 4 Sept 06 - 16 March 07
Given these dates if one was to attend OCC 192, ending 11 August then one could reasonably expect to pick up with FOX on 4 Sept, with the possibility of a few working parties in the meantime but more than likely they will give you leave during the break.