State territory — Miscellaneous — Ships — Whether assimilated to State territory — The law of England — National Insurance Act, 1946, and National Insurance (Residence and Persons Abroad) Regulations, 1948.

Jurisdiction — Territorial — At the maritime frontier — Status of ships flying national flag — Whether assimilated to territory of State — Whether person on vessel flying British flag is “ within the United Kingdom ” — Reciprocal Agreement on Social Security between United Kingdom and New Zealand, 1955 — National Insurance Act, 1946.

Jurisdiction — On the high seas — Law of the flag — Jurisdiction over national ships on high seas distinguished from territorial sovereignty — Whether British ship on high seas part of “ His Majesty's dominions ”.

State territory — Nature of territorial sovereignty — National ship on high seas — “Floating island” theory — Whether within “His Majesty's dominions” for purposes of National Insurance (Residence and Persons Abroad) Regulations, 1948 — Ordinary meaning of “His Majesty's dominions” — The law of England.