Functional standing is the layer that stacks. On top of the inherent floor of basic standing, a participant accumulates many kinds at once — affected-party standing because a decision touches them, expert standing in a domain, ownership standing over an asset, leadership standing for a project, stewardship standing for a larger system. Each adds a specific combination of rights, access, responsibility, and jurisdiction, and each is differentiated: participants legitimately hold different claims depending on relationship, competence, consequence, ownership, and circumstance.
Two things keep it from hardening into generalized rank. It is domain-bounded — it expands jurisdiction only within the relationship that created it, so a physician’s medical standing grants no political standing and a billionaire’s ownership grants no jurisdiction over scientific truth. And it adds no human worth — a surgeon has more decision standing in the operating room than a visitor without becoming a higher-order person. Its added authority is always burden-bearing: more functional standing means more accountability, not just more power. See Standing.