Guys you are wrong.
Forget the OMA for the moment, it is written with you being on duty in mind.
Acclimatisation definitions come from Medical research which states that if you spend 3 local nights in a time zone greater than 2 hours away from where you were originally acclimatised then you are now acclimatised to that time zone. End Of.
So irrespective of whether on duty or leave if you have been away from DXB in said time zones for 3 local nights you are not acclimatised to DXB.
Do you think the company gives you 3 days off after leave before a ULR out of the goodness of their hearts??