Defence Act 1954
Prohibition of assignment of pay, etc.
102.— Every instrument (being an assignment of, a charge on, or an agreement to assign or charge any pay, allowance, gratuity or grant) made by a member of the Defence Forces shall be void except—
( a) it is made, in pursuance of any regulation made in this behalf by the Minister, for the benefit of the family (including an illegitimate child) of that member, or
( b) it is authorised by subsection (2) of section 100 or by an Act of the Oireachtas.