sentences:  A WIPO study in 2011 recommended that «The difficulty of the rule of the comparison of terms applicable to the duration for protection, as provided by Article 7(8) of the Berne Convention, should at least be assessed».The terms of existing or new bilateral treaties may moreover override these conventions, as long as such bilateral treaties meet the minimum requirements of the conventions.This is defined in article 20 of the Berne Convention and in articles XVIII and XIX of the UCC.