Recently a researcher asked us to help him find if there were any significant recent amendments to the FAO Basic Texts.
The Basic Texts are available only online here, but we were not sure how often they are updated. In order to check for amendments that may not have been added to the website, you have to look in the FAO Conference Reports.
The Conference Reports are all available here, back to 1945. After the 34th Session, they are available as searchable pdfs. Search for the word "amendment" to find recent additions.