All the regs are at:
https://www.gcaa.gov.ae/en/epublication/pages/cars.aspx
The limit on flight hours is as follows (Issue 4, Rev 1 at 1 Jan 16)
CAR‐OPS 1.1125 Absolute Limits on Flying Time and Duty Period
a. No person shall act as an operating crew member of the flight crew of an aircraft if at the beginning of the flight the aggregate of all his previous flight times;
(1) during the period of 28 (twenty eight) consecutive days expiring at the end of the day on which the flight begins exceeds 100 (one hundred) block hours: or
(2) during the period of 12 (twelve months) expiring at the end of the previous month exceeds 900 (nine hundred) block hours:
b. The maximum cumulative duty hours for Flight crew of an aeroplane shall not exceed;
(1) 55 hours in any 7 consecutive days, but may be increased to 60 hours, when rostered duty covering a series of duty periods, once commenced, is subject to unforeseen delays.
(2) 95 hours in any any 14 consecutive days; and
(3) 190 hours in any any 28 consecutive days.