One application may be made to the Tribunal in each eligibility period. These periods vary from section to section. If an application is withdrawn it is treated as never having been made (s77(2)) so the patient can re-apply within the same eligibility period.
This is in addition, where relevant, to the right to make periodic applications to the hospital managers and the right of the nearest relative to 'order' discharge under s23. NR's require High Court permission to apply to the MHRT where the patient is a ward of court (s33(2)). The Responsible Clinician (in unrestricted cases) and Ministry of Justice (restricted cases) can discharge at any time.
It is also in addition to the various powers and duties to make automatic references.
A change in status between the application and the hearing date can affect whether or not the application remains in force. For example, changing from s2 to s3 does not affect the validity of a Tribunal application (R (M) v South Thames MHRT (1997) EWHC Admin 797), whereas a change from s47/49 to s47 does (R (MN) v MHRT (2008) CO/5741/2007).
DH: Applications to the First-tier Tribunal (Mental Health) - 2/9/10 - gateway reference 14763 - Summary of when and by whom applications may be made to the First-tier Tribunal