Single shareholder companies get the lightest version of the regime, not an exemption from it. Where the sole owner has already told the company that he or she is the controller and supplied every required particular, section 653S removes the need to serve a notice. The register and the designated representative stay compulsory, and this is the profile found in default most often.
Groups held through an offshore holding company carry the heaviest tracing burden. If a Hong Kong company is wholly owned by a BVI company which is itself owned by one individual, both go into the register, the entity as a registrable legal entity and the person as a registrable person. Tracing does not stop at the first corporate layer, and a parent that refuses to answer produces a noted entry, not a blank.
Companies limited by guarantee apply the same conditions differently. With no share capital, the tests that bite are the right to share in more than 25% of the capital or profits, more than 25% of the voting rights and the power to appoint or remove a majority of the board, which puts the focus on the constitution. Charities and societies incorporated under Cap. 622 keep one on the same terms, so the register belongs beside the articles for a company limited by guarantee.
Trust and nominee structures rely on the fifth condition in Schedule 5A, which reaches anyone controlling a trust or firm whose trustees or members meet the first four tests. Where no significant controller exists at all, the company still keeps a register and states that fact in it using the prescribed wording.