MCT clearances
Can anyone tell me, why Muscat ATC is giving the normal Mike 08 0r Mike 26 Departures, which is normal, but also giving clearances on specific airways routings, as part of the departure proceedure. They never used to, and UAE, Bah, Kuwait, and Saudi, don't either, unless, there is a change, to the filed flt plan. Also on over-flights, in the MCT FIR getting airways clearances, as opposed to 'flt planned route'.Presumabably, ATC in any FIR has the roueting of any particular flight,as per the filed flt plan, or does it? So why, have to bring it up in the departure clearance? Of course, if there is a change, quite fine. This is not running down MCT ATC, just want to know the reason.