This may be the crux of the problem here too A & C. A maintenance organization that is treading a thin line financially already may suddenly find itself without customers if it mandates that SIDs be carried out and the opposition on the other side of the field doesn't. Same goes for an operator. Spend possibly tens of thousands of dollars and ground your fleet to make them compliant while The opposition ignores it and steals all your work. There needs to be a black and white 'yay or nay' from the regulator on this.