Originally Posted by UGBSM

Well, the two "sources" I looked at are different.

ALPA in the SRH says: "Sit Pay is based upon scheduled and/or rerouted scheduled sit times."

The PWA says: "Sit Pay: For all time spent between any two consecutive deadhead and/or flight segments within a duty period, a pilot will receive one minute of pay, no credit (in addition to all other pay) for every 2 minutes, measured from the scheduled block-in to block-out times, in excess of 2 hours."

The SRH is more explicit it seems to me.​​​