10. Her Majesty's forces are not to be taken to consist of any of the establishments or organisations specified in Part 1 of this Schedule by virtue only of the employment in such establishment or organisation of the following persons—E+W+S
(a)any person who is serving as a member of any naval force of Her Majesty's forces and who (not having been an insured person under the National Insurance Act 1965 M1 and not having been a contributor under the Social Security Act 1975 M2 or not being a contributor under the Contributions and Benefits Act) locally entered that force at an overseas base;
(b)any person who is serving as a member of any military force of Her Majesty's forces and who entered that force, or was recruited for that force outside the United Kingdom, and the depot of whose unit is situated outside the United Kingdom;
(c)any person who is serving as a member of any air force of Her Majesty's forces and who entered that force, or was recruited for that force, outside the United Kingdom, and is liable under the terms of engagement to serve only in a specified part of the world outside the United Kingdom.