You may want to reference the following. Hope this helps a bid.

8-F-6 Process of Activation
8-F-6-a Unless otherwise provided for in Section 8-F, a Pilot shall remain in his current
assignment until his activation date in his awarded Category.
8-F-6-b If a Pilot-out as defined in Section 8-E-7-b, the Pilot must, on a Bid Period basis, choose to be available for either TDY or Section 20-H-6 assignments until he begins training for his new assignment but in no case for more than two (2) Bid Periods, unless extended by the Pilot as set forth in Section 8-F-6-b-(3).
8-F-6-b-(1) TDY assignments are only available in Categories offered by the Company. At least one (1) Category must be offered for TDY if that option is elected by the Pilot.
8-F-6-b-(2) Pilots on a TDY assignment shall have all expenses and allowances, as provided in Section 4-E-1, discontinued during periods of unavailability. For purposes of
8-F-6-b-(3) If the Pilot has not begun training by the end of two (2) Bid Periods as set forth in Section 8-F-6-b, he shall be entitled to be released from work obligations and paid reserve guarantee until he starts training. Alternatively, he may choose to extend his TDY or Section 20-H-6 availability for up to two (2) additional Bid Periods. If the Pilot, however, causes a disruption in his training/advancement plan, as defined in Section 8-F-8-b, the Company may extend the TDY or Section 20-H-6 availability period for up to two (2) Bid Periods without his concurrence.