pactional
/ˈpakʃ(ə)n(ə)l/ /ˈpakʃən(ə)l/Chiefly Scottish Law
adjective
Of, relating to, or of the nature of a pact, covenant, or contract; specifically (of a payment, as rent, damages, etc.) in accordance with or specified in a contract; contractual.
Origin
Early 17th century; earliest use found in Francis White (d. 1638), bishop of Ely. From paction + -al.