By section 16(2) of the Mental Capacity Act 2005 (MCA 2005), the Court of Protection has the power to make decisions on behalf of a person (P) or to appoint a deputy 'to make decisions on P's behalf in relation to the matter or matters'. MCA 2005, s 16(2) is subject to the provisions of MCA 2005, s 16(1), which provides that MCA 2005, s 16 'applies if a person ("P") lacks capacity in relation to a matter or matters concerning— (a) P's personal welfare, or (b) P's property and affairs.' MCA 2005, s 2 defines 'lack of capacity' for the purposes of MCA 2005. MCA 2005, s 2(1) provides that, for the purposes of the Act, 'a person lacks capacity