Integrity first
Resolution rules are published before a market opens and are not revised while money is at risk. A contract whose terms can move after the fact is not a contract; it is a discretionary payout.
Where a rule proves ambiguous, the ambiguity is resolved in public, with the reasoning, the source consulted, and the decision recorded where any user can read it. Signatories accept that being seen to resolve badly is less damaging than resolving quietly.