Parliamentary procedure regulates the proceedings of the House and can be divided up into four main sections.
1. Practice is the general understanding established over the centuries and does not need to be formally written down.
2. The Standing Orders are the rules under which Parliament conducts its business and they regulate the way Members behave and debates are organised. Some Standing Orders are temporary and only last until the end of a session or a Parliament. There are roughly 150 Standing Orders relating to public business and over 270 relating to private business.
3. In the House of Commons Rulings from the Chair relate to decisions on procedure which have been referred to the Speaker for clarification. These rulings are later included in newer editions of the Erskine May's Treatise on the Law, Privileges, Proceedings and Usage of Parliament. The book has been revised regularly by successive Clerks of the House and is commonly known as Erskine May. Sir Thomas Erskine May was Clerk of the House of Commons between 1871 and 1886. In the House of Lords, procedure is developed by the House itself through the Procedure Committee which considers any proposals for changes to Standing Orders. In the House of Lords the Procedure Committee authorises the revision of the Companion to the Standing Orders of the House of Lords. It was originally written by Sir John Shaw-Lefevre, the Clerk of the Parliaments in 1862.
4. Other proceedings are controlled by Acts of Parliament which cover such things as Taking the Oath or presenting Bills to Parliament.
Further information on this subject can be found from the following links.
House of Commons Procedure Committee
House of Lords Procedure Committee