Sorry, I realize I wasn't clear about what "policy" means. Also I signed in - this is the original poster.
The assembly has the ability to create academic policy at a university, such as "A student cannot take more than 15 credits each semester."
If that policy is in force, the committee or the assembly itself cannot then approve a proposal to create a program where a student is allowed to take more than 15 credits in a semester.
The committee cannot approve the motion to approve the proposal since it conflicts with the assembly's policy, and the assembly cannot approve it either, without changing or rescinding the original policy. And if by chance either does so (in ignorance of the original policy, for example), the motion to approve the proposal is null and void.
Is that correct?