These Rules set out procedures and practices to be adopted by the Investigatory Powers Tribunal, established under Part 4 of the Regulation of Investigatory Powers Act 2000 (c. 23) (“the Act”). Section 68 of the Act provides that, subject to anything in these Rules, the Tribunal are entitled to determine their own procedure.
Link: The Investigatory Powers Tribunal Rules 2018
Source: Legislation .gov.uk