Travaux préparatoires are the preparatory documents of a particular treaty and may sometimes be used as a supplementary means of treaty interpretation. Travaux préparatoires may include correspondence, records of negotiation, preliminary drafts, and records of international conferences.
Travaux préparatoires are sometimes collected together and published in book-format, but may also be accessible in the documentation of the relevant international organisation.
Below are selected travaux préparatoires, for other possible sources see Collected Travaux Préparatoires.