(1)Subject to such exceptions as may be prescribed—
(a)any term of a contract of a service (whenever made) or any rule of a personal or occupational pension scheme to the effect that an employed earner must be a member of a personal or occupational pension scheme, of a particular personal or occupational pension scheme or of one or other of a number of particular personal or occupational pension schemes shall be void ; and
(b)any such term or rule to the effect that contributions shall be paid by or in respect of an employed earner to a particular personal or occupational pension scheme of which the earner is not a member, or to one or other of a number of personal or occupational pension schemes of none of which he is a member, shall be unenforceable for so long as he is not a member of the scheme or any of the schemes.
(2)Subsection (1) above shall not be construed so as to have the effect that an employer is required, when he would not otherwise be—
(a)to make contributions to a personal or occupational pension scheme; or
(b)to increase an employed earner's pay in lieu of making contributions to a personal or occupational pension scheme.