Who Part 4 covers
is what lets you treat mental disorder without consent. Not every section brings it.
What is Part 4 of the Mental Health Act?
Part 4 is the consent to treatment part of the Act. Its core is s63. A Part 4 patient can be treated for their mental disorder without consent, if the approved clinician in charge gives or directs the treatment.
Three kinds of treatment have extra safeguards: s57 for neurosurgery and hormone implants, s58 for medication after three months, and s58A for . Section 62 lifts those extra rules in a genuine emergency. Patients on a CTO in the community come under instead.
Which sections allow treatment without consent?
| Part 4 applies? | Basis for treatment | |
|---|---|---|
| s2 and s3 | Yes | s63, with the s57, s58 and s58A rules |
| s4 | Only after the second recommendation | Consent or the until then |
| s5(2) and s5(4) | No | Consent or the MCA |
| s35 remand for a report | No | Consent or the MCA |
| s36, s37, s38, s45A, s47 and s48 | Yes, with or without restrictions | s63, with the s57, s58 and s58A rules |
| s135, s136, or a s37(4) or s45A(5) place of safety | No | Consent or the MCA |
| CTO, in the community | No, Part 4A instead | Consent if they have capacity |
| CTO, recalled to hospital | Yes | s63, with the s57, s58 and s58A rules |
| Conditionally discharged | No, unless recalled | Consent or the MCA |
Guardianship gives no power to treat either (Code 26.174). Patients on the sections Part 4 excludes are in the same position as informal patients (s56(3); Code 24.11).
Treatment for the mental disorder only
Part 4 covers medical treatment for mental disorder: treatment whose purpose is to alleviate, or prevent a worsening of, the disorder or its symptoms or manifestations (s145(4)). It includes nursing, psychological intervention, and specialist habilitation, rehabilitation and care (s145(1)).
Physical treatment counts only when it's part of, or ancillary to, treating the disorder, such as treating self-inflicted wounds (Code 24.5). An unrelated physical illness is outside Part 4. See treating physical illness in a detained patient.
Part 4 and the Mental Capacity Act
- Part 4 takes over. You can't use the MCA to treat a Part 4 patient's mental disorder, and an attorney or deputy can't consent to it for them (MCA s28; Code 24.54).
- Advance refusals. Where Part 4 allows treatment over a capacitous refusal, it also allows treatment despite an advance decision. ECT is the exception, outside emergencies (Code 24.54, figure 12).
- Outside Part 4, the MCA applies normally. For a patient on s5(2), s35 or s136 who lacks capacity, the Mental Capacity Act can authorise treatment, even for the mental disorder (MCA Code 13.32).
- Consent still matters. Seek consent wherever practicable, and record capacity and consent, even when you can treat without them (Code 24.41; MCA Code 13.30).
The rules in brief
- Covered. Patients detained under s2, s3, s36, s37, s38, s45A, s47 and s48, with or without restrictions, and patients once recalled to hospital.
- Not covered. Section 4 (until the second recommendation), s5(2), s5(4), s35, s135, s136 and conditionally discharged patients. Treat them like informal patients: consent, or the MCA.
- CTO patients in the community are under Part 4A instead. A capacitous refusal stands.
- Scope. Part 4 is for treatment of the mental disorder. It doesn't reach an unrelated physical illness.
Read more: MHA 1983, s56 · MHA Code of Practice 2015, chapter 24: Medical treatment
Medication and the three-month rule
For the first three months, s63 covers medication for mental disorder. After that you need a certificate.
How the three-month rule works
For the first three months, medication for mental disorder can be given under s63, with or without consent. The clock starts the first time any medicine for mental disorder is given in the current period of liability to detention (s58(1)(b); Code 25.11).
The three months are there to give time to develop a treatment plan (Code 24.40). Seek consent anyway, wherever practicable, and record the answer (Code 24.41).
- It keeps running if the section changes, if consent is withdrawn, and through any time on a (Code 25.12, 25.16).
- It starts again only after a break in liability to detention: discharge without going onto a CTO, a move onto guardianship, or a restricted patient's conditional discharge (Code 25.12).
- Reminders. The managers should remind both the clinician and the patient at least four weeks before it ends (Code 25.15).
Section 58(3): Form T2 or Form T3?
| Form T2: s58(3)(a) | Form T3: s58(3)(b) | |
|---|---|---|
| When | The patient has capacity and consents | The patient lacks capacity, or has capacity and refuses |
| Who signs | The in charge of the treatment, or a | A SOAD, who can't be the or the AC in charge |
| What it certifies | Capacity to understand the treatment, and consent | Lack of capacity or refusal, and that the treatment is appropriate |
| Consultation | None required | A nurse and someone who's neither a nurse nor a doctor (s58(4)) |
Appropriate means appropriate given the nature and degree of the disorder and all the other circumstances (s64(3)). Don't ask a SOAD for a consent certificate you could give yourself, unless you genuinely can't tell whether the patient has capacity or consents (Code 25.44).
Getting a SOAD: step by step
- Request the visit from . As the clinician in charge of the treatment, that's your personal responsibility (Code 25.43).
- Prepare the treatment proposal, with notes of the MDT discussion behind it, for the SOAD (Code 25.47).
- For a complex or unusual regimen, consider a specialist pharmacist review first (Code 25.51).
- Tell the SOAD about any attorney, deputy, advance decision or advance statement (Code 25.52).
- Make sure the statutory consultees and the clinician in charge are available on the day (Code 25.49).
- Tell the patient the outcome yourself, and show them the SOAD's reasons unless that's likely to cause serious harm (Code 25.65, 25.66).
You can act on a certificate before the written reasons arrive, though it's better to wait if there's no hurry. There's no appeal to CQC against a SOAD's opinion (Code 25.64, 25.71).
What the certificate must cover
- Every drug. By name or BNF class, including as-required (prn) medication. For a class, state how many drugs are allowed and any exclusions (Code 25.18).
- Route and maximum dose. For each drug or class. Doses above the BNF limits can be certified, with particular care (Code 25.18).
- Where it's kept. The original with the detention papers, a copy in the notes and a copy with the drug chart (Code 25.75).
- Not an instruction to treat. A certificate allows treatment. Whoever gives it must still judge that it's appropriate at the time (Code 25.72, 25.73).
When a certificate stops covering treatment
- A T2 lapses if the patient withdraws consent, loses capacity, or stops being a detained or CTO patient even briefly. One the AC signed also lapses if the AC in charge changes permanently (Code figure 15).
- A T3 lapses if a patient who lacked capacity regains it, or a patient who was refusing starts consenting or loses capacity (s60; Code figure 15).
- Serious suffering. If consent is withdrawn, a consenting patient loses capacity, or a T3 patient regains it, a course can continue pending a new certificate. The test is that stopping would cause serious suffering (s62(2); Reference Guide 23.39).
- Ask straight away. Request the SOAD at once. If the SOAD won't certify, the treatment must stop (Code 25.81).
Section 61: reporting to CQC
When treatment is given on a SOAD's T1, T3, T5, T6 or CTO11, the AC in charge must report to CQC on the treatment and the patient's condition. The report goes in with the next renewal report, and whenever CQC asks (s61(1)). Give the patient a copy (Code 25.77).
For restricted patients, the timing follows their reports to the Secretary of State (s61(2)). CQC can direct that a certificate stops covering treatment from a set date (s61(3)). A course already under way can then continue only under s62(2).
What the 2025 Act changes
When the treatment reforms start, the three months become two (2025 Act s14). A capacitous refusal will then be overridable only for a compelling reason, with a SOAD's certificate before any treatment (new s57A). The same goes for a refusal through a valid advance decision, attorney, deputy or the Court of Protection. None of this is in force yet. See the 2025 Act.
The rules in brief
- The clock starts the first time they're given medication for mental disorder in this period of detention. Changing drug, or moving from s2 to s3, doesn't restart it.
- After three months. Form T2 if the AC or a SOAD certifies that the patient has capacity and consents. Form T3 if they refuse or lack capacity, where a SOAD certifies that it's appropriate.
- The certificate has to cover what's actually given: the drugs or classes, routes and maximum doses.
- Consent withdrawn? The T2 stops covering the treatment. Ask for a SOAD. Section 62 covers urgent treatment meanwhile.
Read more: MHA 1983, s58 · MHA 1983, s63 · MHA Code of Practice 2015, chapter 24: Medical treatment · MHA Code of Practice 2015, chapter 25: Treatments subject to special rules and procedures
Work out the dates → · Section 58 at a glance · Section 63 at a glance
Urgent treatment: section 62
Lets you act before a certificate exists, in a real emergency.
When can you use section 62?
Section 62 lifts the certificate rules in s57, s58 and s58A when treatment is immediately necessary. It's a strict test. An urgent need, or a belief that treatment would help, isn't enough (Code 25.40).
| Treatment immediately necessary to | Conditions | |
|---|---|---|
| s62(1)(a) | Save the patient's life | None |
| s62(1)(b) | Prevent a serious deterioration | Not irreversible |
| s62(1)(c) | Alleviate serious suffering | Not irreversible or hazardous |
| s62(1)(d) | Prevent violence or danger to self or others | Not irreversible or hazardous, and the minimum interference necessary |
Irreversible means unfavourable irreversible physical or psychological consequences. Hazardous means significant physical hazard (s62(3)). For , only (a) and (b) apply (s62(1A)).
What section 62 does and doesn't do
- It removes the certificate requirement, nothing more. The rest of still applies, so the treatment still needs authority, usually s63 (Code 25.41).
- It lasts only while the need does. Once treatment stops being immediately necessary, the certificate rules return, so each further dose needs the same justification (Code 25.41).
- It isn't for a planned course. Ask for a as soon as you rely on it.
- It isn't a power to treat non-Part 4 patients. Someone on s5(2), s135 or s136 is in the same position as an informal patient: consent, or the (Code 18.41, 16.72).
Continuing treatment pending a new certificate
Section 62(2) is a separate rule. If consent is withdrawn, or withdraws a certificate, a course already under way can continue while a new certificate is sought. The in charge must think that stopping would cause serious suffering (Reference Guide 23.39; Code 25.79).
Ask for a SOAD at once, and stop immediately if they won't certify (Code 25.81). It can't keep ECT or s57 treatment going against a capacitous refusal, because no certificate could ever follow (Code 25.80).
Recording urgent treatment
- What and why. Record the treatment, why it was immediately necessary and how long it was given for, on your trust's form if it has one (Code 25.42).
- Which ground. Name the paragraph of s62(1) you're relying on, and say why it's met.
- Audit. The managers should monitor urgent treatment so it isn't used inappropriately or too often (Code 25.42).
Urgent treatment on a CTO
In the community, a patient with capacity who refuses can't be treated, even in an emergency. Recall is the route (Code 24.17). For a CTO patient who lacks capacity, s64G allows immediately necessary treatment. Force is allowed only if the treatment is needed to prevent harm to them, and in proportion to that harm (Code 24.24 to 24.27).
What the 2025 Act changes
The serious suffering ground will no longer allow medication over a capacitous refusal (2025 Act s17). Urgent ECT over a capacitous refusal will need a SOAD's certificate under a new s62ZA. Neither is in force yet. See ECT and section 58A.
The rules in brief
- What it does. Lifts the certificate rules in s57, s58 and s58A for treatment that's immediately necessary.
- Four grounds. To save life. To prevent a serious deterioration (not irreversible). To alleviate serious suffering (not irreversible or hazardous). To prevent violence or danger, as the minimum interference necessary (not irreversible or hazardous).
- For ECT, only the first two apply.
- It's for the emergency, not for a planned course. Ask for a SOAD as you use it.
Read more: MHA 1983, s62 · MHA Code of Practice 2015, chapter 25: Treatments subject to special rules and procedures
Section 57
The rarest treatment rule, and the only one that needs consent from every patient.
What section 57 covers
Section 57 covers any surgical operation for destroying brain tissue or its functioning, and surgical implantation of hormones to reduce male sex drive (s57(1); reg 27(1); Code 25.7). Regulations can add other treatments.
It applies to every patient, informal or detained (s56(1)). Outside a s62 emergency, it's the one rule in that always needs the patient's own consent.
The requirements: Form T1
- The patient consents.
- A , and two people appointed by who aren't doctors, certify that the patient is capable of understanding the treatment and has consented (s57(2)(a)).
- The SOAD certifies that it's appropriate, after consulting a nurse and someone who's neither a nurse nor a doctor, both involved in the treatment. The second is typically a psychologist, social worker or therapist (s57(2)(b), (3); Reference Guide 23.21).
- Both parts go on Form T1. The consent and certificate can cover a plan of treatment, not just a single procedure (s59).
Before you refer
- Agree the process. Hospitals offering these treatments are strongly encouraged to agree procedures with CQC (Code 25.9).
- Check capacity and willingness yourself. Do it before you ask CQC to start the process. Explain the rules, and make clear that being willing doesn't mean the treatment will go ahead (Code 25.10).
- No substitute consent. The can't be used to give it, and attorneys and deputies can't consent to it (Code figure 12).
- An IMHA. An informal patient discussing s57 treatment qualifies for an IMHA (s130C(3)(a)).
- Reports afterwards. Treatment given on a T1 is reported to CQC, which can direct that the certificate no longer applies (s61(1), (3)).
Withdrawal of consent and emergencies
The patient can withdraw consent at any time before the treatment is complete, and the rest then counts as a new treatment needing fresh certification (s60(1)). The T1 also stops applying if they lose capacity (Code figure 15).
Section 62 can lift s57 in an emergency, but irreversible treatment is allowed only to save life (s62(1)). Neurosurgery is irreversible, so only the save-life ground could ever apply.
Sections 57, 58 and 58A compared
| s57 | s58 | s58A | |
|---|---|---|---|
| Treatment | Neurosurgery and hormone implants | Medication after three months | and its medication |
| Who it covers | Every patient, informal or detained | Part 4 patients | Part 4 patients and all under-18s |
| Capacitous refusal | Final | A SOAD can certify treatment (T3) | Final, outside a s62 emergency |
| Lacks capacity | Can't be given, outside s62 | A SOAD can certify treatment (T3) | A SOAD can certify it (T6), unless it conflicts with an advance decision, attorney, deputy or the court |
| Grace period | None | Three months | None |
| Forms | T1 | T2 or T3 | T4, T5 or T6 |
The rules in brief
- Covers neurosurgery for mental disorder, and surgical implantation of hormones to reduce male sex drive.
- Needs the patient's consent plus a second opinion: a SOAD and two others appointed by CQC certify capacity and consent, and the SOAD certifies it's appropriate (Form T1).
- Applies to everyone, informal or detained. Outside a s62 emergency, there's no route for someone who can't consent. For irreversible treatment such as neurosurgery, that means only to save life.
Read more: MHA 1983, s57 · MHA Code of Practice 2015, chapter 25: Treatments subject to special rules and procedures
Questions trainees ask
What is the three-month rule?
Medication for mental disorder can be given under s63 for three months from the first dose in this period of detention. After that it needs Form T2 (capacity and consent) or Form T3 (a 's certificate).
Which sections don't allow treatment without consent?
Section 4 before the second recommendation, s5(2), s5(4), s35, s135 and s136. On those, treatment needs consent, or the .
What is a SOAD?
A second opinion appointed doctor, appointed by , who certifies treatment as appropriate when a patient refuses or lacks capacity, and for s57 treatment, under-18 and patients.
What is section 58 of the Mental Health Act?
It's the rule for medication for mental disorder once three months have passed since a detained patient's first dose in this period of detention. From then on it needs Form T2, confirming capacity and consent, or a SOAD's Form T3.
What is the difference between section 57 and section 58?
Section 57 covers neurosurgery and hormone implants, needs consent plus a second opinion, and applies to every patient. Section 58 covers medication after three months for detained patients, and a SOAD can certify it over a refusal.
What is section 61 of the Mental Health Act?
It makes the in charge report to CQC on treatment given on a SOAD's certificate, at each renewal and whenever CQC asks. CQC can then direct that the certificate no longer applies.
What do sections 58(3) and 58(4) say?
Section 58(3) sets the two routes after three months: consent certified on Form T2, or a SOAD's Form T3. Section 58(4) makes the SOAD consult a nurse and someone who's neither a nurse nor a doctor before giving a T3.
Can you refuse treatment on a section?
You can refuse, but on most sections lets treatment for the mental disorder go ahead anyway, with extra safeguards for medication after three months. A capacitous refusal of ECT stands outside an emergency. A capacitous refusal of treatment for an unrelated physical illness stands even in an emergency.
Test yourself
A woman moved from s2 to s3 on day 20. She first had an antipsychotic on day 2 of her s2. When does she need a T2 or T3?
Show the answer
B. The three months run from the first time medication for mental disorder was given in this period of detention. Moving from s2 to s3 doesn't restart the clock.
Which of these patients can't be given medication for mental disorder without consent under Part 4?
Show the answer
C. Part 4 doesn't apply to s35, a remand for a report. Treatment needs consent, or the MCA.
Quick-fire
Medication needs a T2 or T3 after
Show the answer
3 months

