This issue goes straight to the district Advancement Committee and Key 3 if it happens to any of my scouts. Our troop prepares an introductory letter for the board that includes the schedule, membership, key requirements from the GTA, and suggested questions. That way it is abundantly clear that (1) my unit, not the district, owns this board; (2) we know what we are doing; (3) the district representative is there to represent, not direct. The system works well. We are fortunate to be in a district that has opted for the unit-run model allowed under paragraph 22.214.171.124.
Several years ago I had a district advancement chair give one of my scouts grief because there was no tour permit attached to his package, and this was after the requirement for tour permits was eliminated. He was also negative about the project report being missing from the package at the board, but it was his own staff that left the project report at the council office and didn’t send it to the board with him. I gave him chapter and verse from the guide to advancement and won my case.