This is the 2004 edition incorporating 2010 and 2013 amendments. Approved Document M: Access to and use of buildings: M1 Access and use M2 Access to extensions to buildings other than dwellings M3 Sanitary conveniences in extensions to buildings other than dwellings M4 Sanitary conveniences in dwellings Contracts and Management Publications Update Service: To ensure that you have the most up-to-date Approved Document or Amendment to an Approved Document to hand, you can now join our CAMPUS service. RIBA Bookshops will automatically send you copies of new releases as and when they are published. Visit our CAMPUS page for further details.