ppf
Apart from certain essential handling tests to prove that PA2 and PA3 behave the same as PA1, the a/c will be assumed to have the same envelope clearances as PA1.
As a result these mission systems a/c can go straight in to the multitude of avionics tests required to demonstrate the aircraft's capability.
Once the customer is satisfied with the level of maturity, they will then make the decision to carry on with the production order.