General provisions regarding entry clearance, leave to enter or remain in the United Kingdom (paragraphs 7 to 39E). Immigration Rules part 1: leave to enter or stay in the UK.This contains an explanation of who’s covered by the Immigration Rules, dates of effect and definitions/interpretations of the terms used. You can view the archived copies of the consolidated Immigration Rules as they were on the date before each statement of changes came into effect. The index page will help you find the part you need. The rules are divided into different documents. They are updated on a regular basis and all changes can be found in the Immigration Rules: statement of changes. The Immigration Rules are some of the most important pieces of legislation that make up the UK’s immigration law.