(1)Statements made or documents produced by or on behalf of a person shall not be inadmissible in any such proceedings as are mentioned in subsection (2) below by reason only that it has been drawn to his attention that—
(a)in relation to tax, the Board may accept pecuniary settlements instead of instituting proceedings, and
(b)though no undertaking can be given as to whether or not the Board will accept such a settlement in the case of any particular person, it is the practice of the Board to be influenced by the fact that a person has made a full confession of any fraud or default to which he has been a party and has given full facilities for investigation,
and that he was or may have been induced thereby to make the statements or produce the documents.
(2)The proceedings mentioned in subsection (1) above are—
(a)any criminal proceedings against the person in question for any form of fraud or wilful default in connection with or in relation to tax, and
(b)any proceedings against him for the recovery of any sum due from him, whether by way of tax or penalty, in connection with or in relation to tax.