The LPA sits squarely within the Mental Capacity Act 2008, which consolidated Singapore's law on persons who lack capacity. The definition of incapacity comes from section 4 of the MCA: a person lacks capacity in relation to a specific decision if, because of an impairment of the mind or brain, they cannot understand the relevant information, retain it, weigh it, or communicate their decision. Capacity is decision-specific and time-specific, so a person may be able to decide some matters and not others, and this is assessed at the moment the decision must be made. The LPA itself is established by sections 11 to 17 of the MCA, which set out how it is created, its scope, and the court's powers to intervene where validity is in doubt.
Administration falls to the Office of the Public Guardian (OPG), a division of the Ministry of Social and Family Development. The Public Guardian exercises statutory functions under section 31 of the MCA: registering LPAs, supervising donees and deputies, and investigating complaints of abuse. Critically, an LPA has no legal effect until it is registered with the OPG. A signed but unregistered form is worthless when it is finally needed. The statutory text is available through the Mental Capacity Act 2008 on Singapore Statutes Online, the authoritative source for the current provisions.
Form matters as much as substance. The application must be witnessed and certified by an LPA certificate issuer, who must be an accredited medical practitioner, a practising Singapore lawyer, or a psychiatrist. The certificate issuer confirms that you understand the purpose and scope of the LPA and that you are acting free of fraud or undue pressure. Where you also want your donee to hold financial authority, our note on the standalone letter of authorisation and agency arrangements explains why that is a weaker, revocable substitute that fails on incapacity.