Sentence:  This preference for dynamic or evolutionary interpretation over <WSD>originalist</WSD> interpretation is reflected in the structure of the Vienna Convention itself; subsequent agreements and understandings between the parties, as well as any relevant rules of international law (obviously including custom, which is necessarily evolutionary) are primary, obligatory sources of treaty interpretation according to Article 31, ... 
Meaning of the word marked with <WSD> tags:  One who aims to discover how the writers of a document intended it to be interpreted, and to interpret it in that way.