Last spring, an International Diplomatic Conference on Maritime Law was held in Brussels, resulting in two draft conventions aimed at harmonizing aspects of maritime regulation. The conventions, finalized in April, await ratification by participating governments, including the United Kingdom. The British Government’s delay in formally presenting the conventions to Parliament has raised concerns, particularly regarding one convention addressing the immunity of state-owned vessels.

The conference produced two main agreements: one focused on the unification of rules concerning the immunity of state-owned vessels, and the other on maritime mortgages and liens, the latter being primarily legal and commercial in nature. While the maritime mortgage convention appears less contentious, the immunity convention has prompted unease within some British circles due to its potential implications for national security and naval operations.

At a recent Inter-Parliamentary Conference held in London, attended by about forty foreign parliamentary and diplomatic delegations, members urged that the British Government expedite ratification of the conventions. Such calls come amid reports of hesitation within certain government factions about adopting the immunity convention. Critics suggest this reluctance may stem from the convention’s provisions, particularly Article 7, which some view as undermining Britain's naval blockade capabilities.

These concerns draw parallels to the pre-World War I Declaration of London, a maritime law agreement that was ultimately not ratified by Britain due to similar fears about compromising naval authority. Historical accounts, including references in Colonel House’s memoirs, indicate that external pressures have previously encouraged the British Government to limit its blockade powers, sometimes motivated by commercial or sentimental considerations.

The immunity convention seeks to minimize distinctions between liabilities for privately operated vessels and those for state-owned ships. For countries like the United States, Australia, Canada, and some European and South American nations, where significant portions of the merchant fleet are state-owned or state-operated, such changes could afford broader protections. Britain’s mercantile marine, largely private, would generally benefit from reduced discrimination; however, the convention’s provisions could also enable certain states to extend immunity to vessels in wartime by nominally placing them under state ownership.

Article 7, in particular, has drawn scrutiny due to its vague wording on the rights related to seizure and detention in wartime. Critics argue that, if adopted, it could allow nations to shield their merchant fleets from British naval blockades and prize court jurisdiction by designating vessels as state-owned, thereby significantly weakening a key instrument of British and imperial defense.

The convention includes a clause allowing signatory states to exclude their self-governing Dominions and overseas territories from its application, reflecting differing interests within the British Empire. The British government’s official representative at the Brussels conference was Sir Leslie Scott, K.C., M.P., the former Solicitor-General. Notably, the United States did not participate in the conference.

The debate continues over whether the commercial benefits of the maritime law conventions outweigh potential costs to Britain’s naval strategy and imperial security. The government’s ultimate decision on ratification remains pending amid these competing considerations.