Gents hate to say this but the sim duty when on high hours was a Gulf Air invention.
About 3 years ago we were all at 900 max and next thing we know is they sent us a memo (not an ammendment in OM(a) which is approaved by the licencing authority) to say that anyone on high hours leave will be rostered for SIM STBY.
Simply tell them to F
ck Off. If a few of your colleagues accept it then they will pretty much make it policy and screw all concerned.
Stand up to this kind of abuse guys, we work hard enough.
Cheers
Fluffies