Within/outside the purview of something
Definition 1 of 2
Pro Tip 1/3Authority Boundaries
Use it to discuss what someone or an organization can control or decide. 
Setting budget limits is within the purview of the finance committee.
Pro Tip 2/3Responsibility Clarification
Helps specify who is responsible for what actions or decisions. 
Curriculum development falls within the purview of the academic council.
Pro Tip 3/3Debate Framing
Clarifies what is up for discussion and what is not. 
This matter is within the purview of our committee, not the neighboring town's council.