Management of HIMI is performed by the Australian government. This is done through several pieces of legislation

• Environment Protection and Biodiversity Conservation Act 1999: Identifies, assesses, and manages areas of national environmental significance. Responsible for assessing environmental impact and approving any activities within HIMI.

• Environment Protection and Management Ordinance 1987: Provides additional protections for indigenous animals and plants within HIMI. Enforces that no person may introduce or remove any organisms into the protected area without specific permission.

• Fisheries Management Act 1991: This act provides a framework for sustainable management of the fisheries outside of HIMI as these actions impact biodiversity within HIMI. Through the implementation of licensing and quotas, fish stocks are preserved. 

• Navigation Act 2012: This act regulates vessels operating in open waters of Australia. This act regulates any maritime traffic within HIMI to prevent accidents, reduce pollution, and protect marine species.

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In addition to national Australian governance, HIMI is protected through the international treaty the Convention on the Conservation of Antarctic Marine Living Resources (CAMLR). CAMLR acts to protect and conserve Antarctic marine species through enacting laws and conservation measures. These help to prevent overfishing and mitigate risks to biodiversity (Constable et al., 2024, p. 91-93).