Introduced in January 2005, as a part of the building regulations managed by the Department for Communities and Local Government (DCLG). The Part P requirement is that "Reasonable provision shall be made in the design and installation of electrical installations in order to protect persons operating, maintaining or altering the installations from fire or injury." All work on fixed electrical installations in dwellings and associated buildings must comply with relevant standards. Work affected by Part P must be notified to and inspected by building control bodies. This can be both timely and expensive, which is why many choose to join a Part P Competent Person Scheme (CPS), meaning they are sufficiently competent and qualified to self-certify that their own work complies with the relevant building regulations.