hubieran pretendido
-they/you had intended
Past perfect subjunctive ellos/ellas/ustedes conjugation of pretender.

pretender

Si los signatarios hubieran pretendido incluir una disposición de ese tipo (que hubiera cambiado radicalmente las medidas de procedimiento descritas en las disposiciones en materia de solución de diferencias del Acuerdo), lo hubieran hecho de manera expresa.
Had the Parties intended to include such a requirement (which would have drastically changed the procedural steps delineated in the dispute settlement provisions of the Agreement), they would have done so explicitly.
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leftovers