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. 2025 Oct 4;11(1):784–795. doi: 10.1159/000548765

Table 1.

Summary of consent systems and overrule policy

Country/Region Consent system Family’s role to overrulea
Australia Opt-in Formal
Canada Opt-in Formal
China Opt-in Formal
Hong Kong Opt-in Formal
Malaysia Opt-in Informal
Singapore Opt-out Not allowed
Taipei Opt-in Formal
UK Opt-out Formal
USA Opt-in Informal

aInformal overrule: no legal right to overrule, but clinicians do permit it under certain circumstances.