When a national civil defence emergency management plan includes information from another source, it is called incorporation by reference. This happens when the plan uses information from somewhere else, like a document or a website, instead of writing it out in full. If the plan does this, it must follow certain rules from the Legislation Act 2019, which you can find on the Legislation Act 2019 website, specifically sections 63 to 66 and Schedule 2, but with some changes. You need to know that some parts of Schedule 2 do not apply, like clause 1, and other parts apply differently, like when it says "chief executive" it really means the Director. The rules from the Legislation Act 2019 help make sure the information in the plan is clear and easy to understand.