Hotrod
Same rules apply even for ETOPS flights but times are different. Our busses are 1 hour at OEI cruise, including 330 if it's a non ETOPS aircraft, or operating from USA.
A330 ETOPS aircraft and A340 are 2 hours at OEI cruise
Also as noted above, check minmas. Our bus fleet all drop from Cat 3C to Cat 3A minima when OEI.
Minimas also different when operating from USA/CAN
Regards Expat