Translate the following English sentence to French:
"It was in fact the first time that they had debated all aspects of Permanent Status without any taboos and neither hesitated in advancing and relaxing the positions of principle which they had hitherto presented as non-negotiable."
Pour la première fois, en effet, ils ont débattu, sans tabou, de toutes les questions relevant du statut permanent, n'hésitant pas, l'un comme l'autre, à avancer, à assouplir des positions de principe présentées jusqu'alors comme intangibles.