So if you accelerate AT 3000 ft on a nadp 1, you are pushing your luck...
How so?
Just to give you some examples...Qantas, Lufthansa, United, Atlas Air, ANA, all use 1500' for CLB thrust reduction and 3000' for accel.
The exact NADP1 wording is "At or Below" So if you start accelerating at 3001' or even 3100' its not the end of the world.
Qantas changed their NADP1 procedure only at EGLL, where it was no-derates/assumed-temp takeoffs, CLB thrust reduction at 1000' and acceleration at 4000'. (Not sure if this applies to current A380 ops)
If your implying that a acceleration height above 3000' cannot be called NADP1, then so be it.
I am not only implying it,I am saying it and I am not the person who defined NADP1,ICAO did.
Now if all those airlines you are apparently familiar with(magazines?)decide as a matter of simplicity to tell you to accelerate AT 3000 ft (thrust reduction at 1500) which is the old ICAO A and mostly used by crews then fine.
Now if you reduce the thrust at 1500ft and accelerate at 2000ft,you will be in NADP 1 and save fuel in the process.