Section C1 Of The Cibse Guide - Section 1: Introduction What is an Approved Document? 1.1 This document has been approved by the Secretary of State to provide practical guidance on ways of complying with the requirements in Part F of Schedule 1 to, and regulations 39, 42 and 44 (in so far as it relates to fixed systems for mechanical ventilation) of, the Building Regulations 2010 (SI 2010/2214) for England and Wales, and. Congratulations, Pat! Well I also did my exam on Sunday and I want to thank you for your website which helped me alot. I spent only 5 days straight before the exam but did not have time to do any mock exams. well I scored only 161 which was not too bad for the effort I spent although I did study hard.. Scribd is the world's largest social reading and publishing site..