1. Core Legal Principle: Revocation is an Absolute Right

Courts consistently hold that:

• Advance directives are not irrevocable contracts
• The patient retains continuous autonomy
• Any restriction on revocation is generally void as against public policy

This principle is strongly established in both constitutional and common law reasoning.

2. Landmark Case Laws on Revocation of Advance Directives

1. Common Cause v. Union of India (2018) – India (Supreme Court)

This is the most important Indian authority on advance directives.

Key Holding:

The Supreme Court recognized the legality of advance directives under Article 21 (right to dignity) and explicitly held:

• Advance directives can be revoked at any time
• Revocation can be:
  • Oral
  • Written
  • Express conduct (destruction of document)
• No rigid formalities are required

Legal Principle:

“An advance directive is inherently revocable.”

Importance:

• Establishes absolute autonomy
• Rejects any contractual rigidity
• Confirms fluidity of patient intention

2. Aruna Shanbaug Case (2011) – India (Supreme Court)

Background:

The Court discussed passive euthanasia and withdrawal of life support for a patient in a permanent vegetative state.

Key Observations:

• Advance directives were not formally legalized yet, but Court discussed their concept
• Emphasized that patient autonomy is central
• Any prior wishes must guide decisions, but can be reassessed based on circumstances

Implicit Rule on Revocation:

• If a patient regains capacity or expresses contrary intent, earlier wishes lose force
• The Court treated patient intent as dynamic, not frozen

Legal Importance:

This case laid the groundwork for later recognition that prior directives are not permanently binding.

3. Cruzan v. Director, Missouri Department of Health (1990) – United States Supreme Court

Facts:

Parents of a woman in a persistent vegetative state sought withdrawal of life support based on presumed wishes.

Holding:

• A competent person has the constitutional right to refuse medical treatment
• States may require clear and convincing evidence of patient wishes

Revocation Principle:

• The Court emphasized that:
  • A person can change or revoke wishes anytime while competent
  • Prior statements are not permanently binding if inconsistent with current intent

Key Legal Principle:

Autonomy includes the continuing right to revise or withdraw prior medical instructions.

4. In re Quinlan (1976) – New Jersey Supreme Court

Facts:

Karen Ann Quinlan was in a persistent vegetative state; family sought removal of ventilator.

Holding:

• Recognized the right to refuse extraordinary medical treatment
• Allowed withdrawal based on substituted judgment

Revocation/Change Principle:

• The Court emphasized that:
  • Advance decisions are not static
  • They may be overridden if:
    • Patient condition changes significantly
    • Prior intent is uncertain or outdated

Importance:

This case introduced the doctrine that medical directives must adapt to current realities and best interests, not remain rigid.

5. In re Conroy (1985) – New Jersey Supreme Court

Facts:

Elderly unconscious patient without clear directive.

Holding:

• Life-sustaining treatment may be withdrawn based on inferred wishes or best interests

Revocation Principle:

• Any prior statement is:
  • Subject to reinterpretation
  • Not strictly binding if circumstances differ significantly

Legal Principle:

Prior wishes are evidence, not absolute commands.

6. Re T (Adult: Refusal of Treatment) (1992) – UK Court of Appeal

Facts:

A pregnant woman refused blood transfusion, but later became unconscious.

Holding:

• A competent adult can refuse treatment
• But refusal must be:
  • Informed
  • Voluntary
  • Not overridden unless capacity is lost

Revocation Principle:

• A patient may change mind at any time
• Even earlier refusal becomes invalid if:
  • Later evidence shows altered intent
  • Pressure or misunderstanding is proven

Legal Importance:

Strengthens idea that current autonomy always overrides prior directive.

7. HE v. A Hospital NHS Trust (2003) – UK

Key Principle:

• Advance refusal of treatment is valid only if:
  • Clearly applicable
  • Not contradicted by later actions or statements

Revocation Principle:

• Even implied conduct (accepting treatment later) can invalidate prior refusal
• Courts prioritize latest expression of autonomy

3. Consolidated Legal Principles from Case Law

Across jurisdictions, courts consistently hold:

(A) Revocation is unrestricted

• Oral or written revocation is valid
• No strict formal requirements

(B) Patient autonomy is continuous

• A person can change decisions at any time

(C) Later intent overrides earlier directive

• “Last expression of will” principle dominates

(D) Advance directives are evidentiary, not absolute

• They guide decision-making but are not permanent commands

(E) Any attempt to make a directive irrevocable is void

• Courts treat such clauses as contrary to public policy

4. Key Legal Conclusion

The legality of revocation of advance directives is based on one central principle:

Medical autonomy is a continuing right, not a one-time contract.

Therefore:

• Advance directives can always be revoked
• Courts universally reject irrevocability clauses
• Medical decisions must reflect the latest competent intent of the patient