Any time you change a machine parameter, air pressure, media flow rate, change a hose or nozzle, you must run a new saturation curve (4-strips etc.).
If you submitted a plan to your customer indicating any/all of those parameters then you may need permission to continue. Usually the customer wants you to satisfy the intensity and coverage requirements and no mentin is made of parameters. But, if you submitted parameters then you would be expected to re-submit for customer approval.