the hog, on 2013-September-19, 18:16, said:
Marston - Burgess had the agreement that after a strong 1C opening by their side, and the opps bid to the 5 level at any time, pass was forcing.
I see a similar reference to FP being on when the opps bid to the 5 level on the first round on the CC of Marston-Thomson from 2005 but no reference to what double might be besides penalty.