A group says it manages a community orchard. Does that include the adjoining meadow? Can neighbors pick fruit, or only members who help maintain the trees? Without answers, people may follow different understandings while each believes the others are breaking the rules.
Resource and user boundaries are one part of commons governance. They identify the scope of a shared arrangement. They do not require every boundary to be a fence or every right to be identical.
Drawing the line changes the group
Imagine the orchard group admitting anyone living nearby but reserving certain harvesting days for those who maintain the trees. That creates overlapping rights rather than a simple division between insiders and outsiders. People can understand those distinctions if the arrangement is explicit.
A rigid line can also conceal legitimate claims. A family that has collected fallen fruit for years may suddenly be called an outsider by a newly formed association. Naming a boundary does not resolve whether the group has treated that history fairly.
The practical purpose is to make responsibility and access discussable. People need to know which resource their commitments protect and whose actions affect it. Boundary decisions become useful when they clarify those relationships rather than merely giving the most organized group a convenient way to exclude everyone else.