Can one BP picker associated with BP in parent shell being associated with another BP in sub-shells?

Background:

Parent shell with it's own set of BP's. A BP picker being used to pull info from parent shell BP

Sub-shells with their own set of BP's. A BP picker being used to pull info from sub-shell.

Question:

Can the same BP picker being used in both cases?

Or do I need to create a separate BP picker for the other environment?

Thank you.

Anita