What are "hard and fast rules" in?

Question

By the time the team was ready to present the plan for MTV World, MTV's annual budget had already been set. But because the organization eschews hard and fast rule about how and when innovation happens, MTV World got the green light anyway.

Does "hard and fast rules" mean "rigit rules"?

Answer 1

it is not changeable under any circumstances no flexibility. in a sense somewhat rigid only.