RewardRef

The identity of a declared reward term. A term is (source, kind, rate, sense), so its identity is its own — one source may back several terms at different rates or senses.

Carries its element for the same reason LeverRef does, and pre-emptively: D.16 records that the lever/reward pair has produced the same defect on both sides five times, and fixing one of them alone is how that keeps happening.