First published in 2017, PI’s Guide to International Law and Surveillance is an attempt to collate relevant excerpts from these judgments and reports into a single principled guide that will be regularly updated. This is the fourth edition of the Guide. It has been updated it to reflect the most relevant legal developments until March 2024.The Guide aspires to be a handy reference tool for anyone engaging in campaigning, advocacy, and scholarly research, on these issues. The fourth…