In EASA land with a twin engined aircraft with a passenger seating configuration of 19 seats or less (CL60) you are good to go up to 120 minutes WITHOUT a CAA approval. That is sufficient for most Operations, but not all. Beyond 120 minutes you need a CAA approval on your OPS SPECS which can be hard to come by. To ,go beyond 120 you will need dispatcher training and procedures, maintenance procedures, pilot training and a monitoring of 'engine events' and oil consumption. Yet this is NOT yet a full blown ETOPS approval. Beyond 180 minutes at OEI TAS you need a specific full blown ETOPS approval. We get by with the 120 minutes on our CL650.
EASA CAT. OP. MPA. 140 is the legislation here, it was ammended in 2019 by EU 2019/1387 which lifted the 100 000 lbs MTOM restriction which was penalizing for the new heavyweight jets such as the Global 7500.
This is the EASA text for up to 120 minutes OEI:
(a) Unless approved by the competent authority in accordance with Subpart F of Annex V (Part-SPA), the operator shall not operate a two-engined aeroplane over a route that contains a point further from an adequate aerodrome, under standard conditions in still air, than the appropriate distance for the given type of aeroplane among the following:
(1) for performance class A aeroplanes with a maximum operational passenger seating configuration (MOPSC) of 20 or more, the distance flown in 60 minutes at the one-engine-inoperative (OEI) cruising speed determined in accordance with point (b);
(2) for performance class A aeroplanes with an MOPSC of 19 or less, the distance flown in 120 minutes or, subject to approval by the competent authority, up to 180 minutes for turbojet aeroplanes, at the OEI cruising speed determined in accordance with point (b);
(3) for performance class B or C aeroplanes, whichever is less:
(i) the distance flown in 120 minutes at the OEI cruising speed determined in accordance with point (b);
(ii) 300 NM.
(b) The operator shall determine a speed for the calculation of the maximum distance to an adequate aerodrome for each two-engined aeroplane type or variant operated, not exceeding VMO (maximum operating speed) based upon the true airspeed that the aeroplane can maintain with one engine inoperative.
(c) The operator shall include the following data, specific to each type or variant, in the operations manual:
(1) the determined OEI cruising speed; and
(2) the determined maximum distance from an adequate aerodrome.