"How to Read These Drawings" was the title for a block of eight notes on the cover page of a set of drawings we received. I was looking for some profound guidance since only eight notes were included. I think found it in the last note:
8. In case of conflict between the Architect's and Engineer's drawings in the location of materials and/or equipment, architectural drawings shall govern. The Contractor shall notify the architect immediately of such conflict.
Be careful what you say. The note sets an order of precedence. The precedence resolves the conflict without the Architect's intervention. The Contractor is able to rely on the precedence for bidding and building the project. If the Architect makes a revision after being notified of the conflict, the revision may invite a Change Order.