Paragraph 1 of Article 22 in Schedule 1 to the Diplomatic Privileges Act 1964 (inviolability and protection of premises) shall be extended to any consular premises of the Union of Soviet Socialist Republics, and paragraph 1 of Article 30 in that Schedule (inviolability of private residence) shall be extended to the residences of consular officers of the Union of Soviet Socialist Republics, provided that any such premises or residence may be entered by the authorities of the United Kingdom with the consent of the head of the consular post or the head of the diplomatic mission in the United Kingdom of the Union of Soviet Socialist Republics or of a person nominated by either of them.