When departing under NADP1, in an A320, I was told not to set standard until reaching acceleration altitude. This often means reading back “climb FLIGHT LEVEL xxx” and then setting xx,000 and reading “xx,000 blue”, waiting until Acc. Alt to then set standard. Recently I had someone say that it doesn’t matter if you set standard before Acc. alt.
Anyone know definitively, and / or have a reference?