FAQ n.47614

Yes. This is provided that re-planning of rest is completed and notified before the rest period has started and the re-planning practices do not conflict with a crew member’s opportunity to plan adequate rest as required by ORO.FTL.110 (a).  

In any case, the time between the end of one recurrent extended recovery rest period and the beginning of the next recurrent extended recovery rest period cannot be more than 168 hours.

Operator’s procedures for re-planning should describe by which means the opportunity for crew members to plan adequate rest is provided in the case of re-planning.