From the DALPA blast mail that went out today. This assuming you have not already reported for the rotation. If you have, a whole other set of rules applies....

If he is removed from the first leg of a rotation, he must remain available for recovery flying as follows:

· If he is notified of the removal before reporting for the original rotation,
o He has no obligation to be contactable prior to the original report time. He
is essentially on short call beginning at the original report time and continuing for six hours, unless he is notified of a recovery assignment or released by Crew Scheduling prior to six hours.
o He may be notified, prior to the original report, of a recovery assignment. He is under no contact obligation, but may acknowledge such recovery assignment and then report at the scheduled report time for the recovery rotation.
o He may be assigned flying that reports on any day of the original rotation, but not earlier than his original report, and releases not later than four hours after his original release. An international category pilot may be assigned recovery flying scheduled to release not later than four hours after his original release, or same calendar day, provided the last duty period of the recovery flying contains an ocean crossing.
o If no recovery flying has been assigned by six hours after the original report time, the pilot is released with no further recovery obligation and retains full pay of the original rotation. The pilot is then free to pickup flying over the days of the original rotation and be paid for both rotations.

Also....

A regular pilot will be released from Section 23 K. recovery obligation if
· He requests to be released, and
· Waives his rotation guarantee, and
· Crew Scheduling agrees.

A regular pilot will be released from Section 23 K. recovery obligation if
· He requests to be released, and
· Waives his rotation guarantee, and
· The time until originally scheduled report is greater than 24 hours, and
· Reserves available are at least 50% of reserves required.