Axiom X: The Sanctity of Agreement
Voluntary agreements between Sovereigns shall be honored as entered. No Chapter may retroactively void, alter, or reinterpret a bilateral agreement to which it was not a party.
This is the Contract Axiom. Pacta sunt servanda – but only for voluntary agreements. Axiom IX secures that the voluntariness is real.
No agreement may restrict, penalize, or condition the exercise of Axiom 0. A contract that purports to bind a Sovereign against exit is void in that clause; the remainder stands.
Mechanism
Escrow Primitive anchors agreements. Bitcoin-timestamp makes subsequent manipulation visible.