Section 15 provides for a further additional safeguard - the nominated person safeguard. It replaces and improves upon the nearest relative provisions in the Mental Health Order. Like the formal assessment of capacity, it also applies to an act that is, or is part of, a serious intervention except where the situation is an emergency. In such cases, unless a nominated person has been put in place and, where practicable and appropriate, consulted and his or her views taken into account when D is determining whether the act is in Pās best interests, the defence in section 9 will not apply. Further provision about the appointment of nominated persons is made in Part 3 of the Act.