A power of attorney can last, notwithstanding the incapacity of the donor, only if it is a lasting power of attorney: this is a separate and quite different type of power, which must be in a prescribed form, and, to be valid, once signed and witnessed must also be registered with the Office of the Public Guardian. This new type of power of attorney was introduced in 2007 under the Mental Capacity Act 2005. It replaces the former enduring power of attorney, although enduring powers correctly made before the law changed remain valid. Enduring powers were very different, as they only needed to be registered if the donor later lost capacity.