Tenets
Short, memorable principles for how the team should decide when nothing else spells it out.
This page is still being built out. In the meantime, Project & Program Management's Project Charter has a worked example of Tenets at the single-project scale — "unless you know better ones" keeps them a guide, not a law. For what makes a tenet different from a value, and what separates a good one from a platitude, see Core Skills' Defining Tenets.