497.Certain persons, other than the mental health officer, have a power apply to the Tribunal for an order under section 257 by virtue of section 256. Those persons are listed in subsection (2) (as read with subsection (3)). Such persons may apply where: the patient has no named person (subsection (1)(a)); the nominated named person appears to the applicant to be inappropriate to act in that role (subsection (1)(b)); or in such other circumstances as may be prescribed in regulations made by the Scottish Ministers (subsection (1)(c)).