La palabra del día: Válido/a/s

Adjective. This word is very much used in Legal Spanish. From the Latin valĭdus: consistent, plausible, or admissible. Also can mean enforceable, if we are speaking about legislation. E.g.: La DPSG formula su Ley scout, que sigue siendo válida hasta 1971: The DPSG formulates its Scout Law which remains in force in the same form until 1971.
The noun is la validez. E.g.: Por tanto, ni ese acto ni sus resultados tienen validez jurídica: his act and its results therefore have no legal effect. dc