Instrument
An Instrument represents a durable formal, technical, legal, financial, policy, measurement, or representational construct that changes how the ecology can operate.
Specification-sourced: quoted from the governing specification, pending the applicable specification-owner approvals. The specification controls.
In RSMOne's words
Instrument is one of the ten foundational kinds. Contracts, certifications, loans, permits, credits and measurement devices are Instruments because they create rights, obligations, evidence, constraints or incentives; most Instruments participate without institutional agency.