Amendment Powers in Trust Deeds: Allocation Between Settlor and Trustee

The Privy Council’s ruling in Grand View Private Trust Co Ltd v Wong [2022] UKPC 47 — a Hong Kong appeal — has fundamentally shifted the calculus for private trust structuring in the city. The judgment clarified that a trust deed’s amendment power, if vested solely in the trustee, cannot be used to override the settlor’s original intention without beneficiary consent, absent explicit contrary wording. This decision, coupled with the Hong Kong Inland Revenue Department’s (IRD) December 2024 updated guidance on the unified profits tax exemption regime for family offices (Departmental Interpretation and Practice Notes No. 62), now compels practitioners to re-examine the allocation of amendment powers between settlor and trustee with surgical precision. The 2025-2026 regulatory cycle has made this a live compliance issue: the 2025-26 Budget introduced a 100% profits tax exemption for qualifying single-family offices, effective from April 2025, which directly ties the tax status of a trust to its deed’s governance provisions. Misallocated amendment powers risk unwinding the tax exemption, triggering a 16.5% profits tax charge on investment returns. This article dissects the legal mechanics, jurisdictional nuances across BVI, Cayman, and Hong Kong, and the specific drafting triggers that determine whether a power is reserved, granted, or shared.

The Legal Framework for Amendment Powers

The Common Law Baseline: Saunders v Vautier and Its Limits

The starting point for any trust amendment analysis is the rule in Saunders v Vautier (1841) 4 Beav 115, which holds that all beneficiaries, if sui juris and collectively entitled to the trust property, can terminate or vary the trust. This common law right is absolute but impractical for modern multi-beneficiary structures. Trust deeds therefore typically confer a statutory or express power of amendment on the trustee, the settlor, or a combination of both.

Hong Kong’s Trustee Ordinance (Cap. 29) does not contain a general statutory power of amendment. Section 41 of the Ordinance permits the court to vary trusts in limited circumstances, but this is a judicial remedy, not a drafting tool. The BVI Trustee Act (Cap. 303) at section 59 and the Cayman Islands Trusts Act (2021 Revision) at section 18 provide statutory variation powers for trustees, but these are subject to the trust deed’s express terms. The Grand View decision confirmed that an express amendment power is a fiduciary power if vested in the trustee, meaning it must be exercised in the best interests of the beneficiaries as a whole, not to benefit the trustee or a third party.

The Grand View Precedent: A Hong Kong Appeal with Global Reach

The Grand View case involved a Hong Kong trust governed by BVI law. The settlor had reserved no amendment power. The trustee, purporting to act under a broad power to “vary or revoke any of the trusts,” removed the settlor as a protector and replaced the governing law. The Privy Council held that the amendment power did not extend to altering the “fundamental nature” of the trust — including the identity of the protector — because that would defeat the settlor’s original intention. The ruling draws a distinction between administrative amendments (permitted) and dispositive amendments that change the substratum of the trust (not permitted without express authority).

For Hong Kong practitioners, the practical consequence is clear: a trustee’s amendment power in a Hong Kong-resident trust, even if broadly worded, is presumptively limited to administrative matters. Any power to change beneficial interests, remove protectors, or alter the governing law must be explicitly drafted. The Hong Kong Court of Final Appeal has not yet ruled on this point, but the Privy Council’s decision is binding on Hong Kong courts for appeals from BVI and other Commonwealth jurisdictions, and is highly persuasive for domestic Hong Kong trusts.

Allocation Models: Three Structural Archetypes

Model A: Sole Power Vested in the Trustee

This is the most common structure in standard-form trust deeds from Hong Kong private trust companies (PTCs) and major banks. The trustee holds a unilateral amendment power, typically subject to a written notice requirement to the settlor. The advantage is operational simplicity: the trustee can adapt the trust to changing tax laws, investment strategies, or family circumstances without seeking the settlor’s consent.

The risk, post-Grand View, is that any amendment affecting the “fundamental nature” of the trust is voidable. The IRD’s DIPN No. 62 (December 2024) adds a further layer: for a family office to qualify for the 100% profits tax exemption under section 20AN of the Inland Revenue Ordinance (Cap. 112), the trust must not be “controlled” by the settlor. A trustee with sole amendment power, if exercised at the settlor’s direction, could be seen as a sham or nominee arrangement, triggering a tax assessment. The IRD specifically examines whether the trustee exercises independent judgment. A deed that gives the trustee sole amendment power but records a practice of following settlor instructions creates a factual tax risk.

Model B: Power Reserved to the Settlor

A settlor-reserved amendment power is common in BVI VISTA trusts (Virgin Islands Special Trusts Act, 2003) and Cayman STAR trusts (Special Trusts Alternative Regime, 1997 Revision). Under a VISTA trust, the settlor can retain the power to remove and appoint trustees, and to amend the trust’s “office of director” provisions, without the trustee having any management role. The BVI VISTA Act at section 15 expressly permits the settlor to retain amendment powers over the trust’s administrative provisions.

The Hong Kong tax risk is more acute here. The IRD’s 2024 guidance explicitly states that a settlor who retains a power to amend the trust deed — including the power to add or remove beneficiaries — will likely be treated as the beneficial owner of the trust assets for tax purposes. This defeats the purpose of the family office exemption, which requires the trust to be a separate legal entity. The 2025-26 Budget exemption for single-family offices (effective from 1 April 2025) applies only to a “qualifying trust” where the settlor has not reserved “effective control” over the trust property. The IRD has not defined “effective control” exhaustively, but the retention of a unilateral amendment power is a red flag.

Model C: Joint or Conditional Powers (The Recommended Approach)

The optimal structure, as articulated by leading Hong Kong trust counsel in 2025, is a joint amendment power requiring the consent of both the settlor (or a protector) and the trustee. The power is typically structured as:

• The trustee may amend the trust deed with the prior written consent of the protector.
• The protector may require the trustee to amend the trust deed, and the trustee must comply unless the amendment is illegal, impossible, or would cause the trust to lose its tax-exempt status.

This model preserves the settlor’s ability to adapt the trust while maintaining the trustee’s fiduciary oversight. The Hong Kong PTC structure used by the Hong Kong Monetary Authority’s (HKMA) 2023 circular on family office governance (Circular No. 23-04-B) recommends a similar joint consent mechanism for PTCs managing family assets exceeding HKD 100 million.

The key drafting point is the scope of the amendment power. The deed should specify that amendments cannot:

• Alter the beneficial interests of any beneficiary without that beneficiary’s consent (if sui juris).
• Change the governing law or jurisdiction of the trust without the trustee’s independent approval.
• Remove the trustee’s right to remuneration or indemnity.
• Cause the trust to cease being a “qualifying trust” under the Inland Revenue Ordinance.

Jurisdictional Nuances: Hong Kong, BVI, and Cayman

Hong Kong: The Domestic Trust and the IRD’s Lens

Hong Kong does not have a dedicated trust statute comparable to the BVI or Cayman regimes. The Trustee Ordinance (Cap. 29) is a 1934-era statute that has been amended only incrementally. The absence of a statutory variation power means that amendment powers in Hong Kong trust deeds are almost entirely a matter of contract law, interpreted by the courts. The Grand View decision, while not directly on Hong Kong law, is the closest the courts have come to defining the limits of amendment powers in a Hong Kong-connected trust.

The IRD’s 2024 guidance on family offices (DIPN No. 62) is the most consequential regulatory development. It states that a trust will not be considered a “qualifying trust” for the profits tax exemption if the settlor retains the power to “direct the trustee in the exercise of any of its powers, including the power of amendment.” This language is broader than the common law test. It catches even informal arrangements where the settlor has no legal power but exercises de facto control. The IRD has indicated it will look at the “substance of the relationship” rather than the strict legal wording.

BVI: The VISTA Advantage and Its Tax Cost

BVI VISTA trusts are the gold standard for settlor control. The VISTA Act at section 15 permits the settlor to retain “the power to amend the trust deed in any respect” without the trustee’s consent. The BVI’s Financial Services Commission (FSC) has confirmed in its 2024 guidance notes that a VISTA trust with a settlor-reserved amendment power remains a valid trust under BVI law.

The tax cost is that BVI trusts are not eligible for Hong Kong’s family office exemption unless they are structured as Hong Kong-resident trusts. The IRD treats a BVI trust as a non-resident entity, meaning its income is not subject to Hong Kong tax in any event, but the 100% exemption does not apply. For a UHNW family that does not need Hong Kong tax residence, a BVI VISTA trust with a settlor-reserved amendment power is the simplest structure. For families seeking Hong Kong tax residence, the VISTA model must be modified to give the trustee a meaningful role.

Cayman: The STAR Regime and the Protector’s Role

Cayman STAR trusts offer a middle ground. The STAR regime permits a trust to be established for non-charitable purposes, with a protector or enforcer appointed to enforce the trust. The Cayman Islands Trusts Act at section 18 provides that the trust deed may confer amendment powers on the protector, who is not a trustee and therefore not subject to fiduciary duties in the same way.

The Cayman Grand Court’s decision in In the Matter of the A Trust (2023) (FSD 123 of 2023) confirmed that a protector holding an amendment power under a STAR trust may exercise it in the protector’s own interest, provided the trust deed expressly so provides. This is a critical distinction from the Grand View principle: in Cayman, a non-fiduciary amendment power is possible if the deed says so. Hong Kong law does not have an equivalent statutory regime, so the Cayman structure is only available for trusts governed by Cayman law. The IRD’s 2024 guidance applies equally to Cayman trusts that are Hong Kong-resident — the tax analysis turns on the settlor’s control, not the governing law.

Practical Drafting Considerations for 2025-2026

The Protector as a Safeguard

The protector is the most effective tool for allocating amendment powers without triggering tax risks. Under Hong Kong law, a protector is not a trustee and owes no fiduciary duty to the beneficiaries unless the trust deed imposes one. The Grand View decision confirmed that a protector’s amendment power, if explicitly stated to be personal and non-fiduciary, can be exercised without reference to the beneficiaries’ interests. The IRD’s 2024 guidance does not treat a protector’s amendment power as “control” by the settlor, provided the protector is independent — meaning not the settlor, the settlor’s spouse, or a company controlled by the settlor.

The recommended drafting is to appoint an independent professional protector — a Hong Kong solicitor, a licensed trust company, or a family office executive who is not a beneficiary — with the power to consent to amendments. The settlor retains no direct power. This structure satisfies the IRD’s “no effective control” test while giving the settlor influence through the protector appointment process.

Sunset Clauses and Regulatory Triggers

A 2025 innovation in Hong Kong trust drafting is the inclusion of sunset clauses tied to regulatory changes. For example, a trust deed may provide that the settlor’s reserved amendment power automatically converts to a joint power with the trustee if the IRD issues a new interpretation note that treats a reserved power as “effective control.” This is a mechanical, objective trigger — no discretion is involved — and it avoids the need for a deed of amendment later.

The Hong Kong Law Society’s Trust Law Reform Committee, in its December 2024 submission to the Financial Services and the Treasury Bureau, recommended that the government introduce a statutory amendment power for Hong Kong trusts similar to section 59 of the BVI Trustee Act. No legislation has been introduced as of Q1 2025, but practitioners should monitor the 2025-26 legislative session for a potential Trusts (Amendment) Ordinance.

The Role of the Letter of Wishes

A letter of wishes is not a binding document, but the IRD’s 2024 guidance explicitly states that it will consider a letter of wishes as evidence of the settlor’s control if the letter “directs the trustee in the exercise of its amendment power.” The IRD’s interpretation is that a letter of wishes that is followed in practice creates a de facto control arrangement, even if the trust deed vests sole amendment power in the trustee.

The solution is to draft the letter of wishes as a non-binding expression of the settlor’s preferences, with a specific clause stating that the trustee is not obliged to follow it and that the settlor has no power to enforce it. The letter should be reviewed and updated annually by the trustee to confirm that it has not become a de facto instruction. The Hong Kong Monetary Authority’s 2023 circular on PTC governance recommends that the board of a PTC document each instance where it departs from the letter of wishes, to demonstrate independent judgment.

Actionable Takeaways

1. Review all existing trust deeds by 30 June 2025 — the IRD’s DIPN No. 62 applies to the 2025-26 tax year, and any trust with a settlor-reserved amendment power that is Hong Kong-resident will face a rebuttable presumption of settlor control, triggering a 16.5% profits tax charge.

2. Convert settlor-reserved amendment powers to joint powers with an independent protector — this is the only structure that simultaneously satisfies the Grand View fiduciary requirement and the IRD’s “no effective control” test, based on the December 2024 guidance.

3. Include a sunset clause that automatically converts a reserved power to a joint power upon a specified IRD trigger — this avoids the need for a deed of amendment later and provides regulatory certainty for the 2025-2026 tax year.

4. Appoint an independent Hong Kong professional as protector — not the settlor, the settlor’s spouse, or a related company — and ensure the trust deed explicitly states that the protector’s amendment power is personal and non-fiduciary, to avoid the Grand View limitation.

5. Audit all letters of wishes annually — the IRD will treat a consistently followed letter of wishes as de facto control, regardless of the trust deed’s wording; document each instance of trustee departure from the letter to maintain independent judgment evidence.