1. United Nations, International Law Commission, ‘Guide to Practice on Reservations to Treaties’ Yearbook of the International Law Commission (vol II, 2011, Part Two).
2. United Kingdom Government, FCO, Legal Directorate, ‘Treaty Section, Treaties and Memoranda of Understanding (MOUs): Guidance on practice and procedures’ (2nd edn, FCO, updated March 2014), PDF, Source: www.gov.uk.
3. New Zealand Government, Ministry of Foreign Affairs and Trade, ‘International Treaty Making: Guidance for government agencies on practice and procedures for concluding international treaties and arrangements’, PDF booklet, August 2018 edition. Source: www.mfat.govt.nz/en/about-us/who-we-are/treaties/.
4. Council of Europe, ‘The Treaty Office in a Nutshell’, PDF booklet. Source: Treaty Office on http://conventions.coe.int (General Information).