La palabra del día: Vinculante/s

Adjective. This word is exclusively from Legal Spanish and it means mandatory, prescriptive, constraining. E.g.: Se garantizará así su carácter vinculante y su aplicación directa por los tribunales nacionales. The convention would thus be rendered binding and directly applicable by domestic courts.
The verb is vincular, to constrain, to make mandatory; although it can be used on a more generic tone as to link. dc