An investment undertaking must not deduct exit tax from a gain payable to a unit trust which has made the appropriate declaration (section 739D(6)(e)). The declaration must:

• be made by the person entitled to the units (the declarer),
• be signed by the declarer,
• be made on the Revenue-prescribed form,
• declare that, at the time of the declaration, the person entitled to the units is a unit trust,
• contain the unit trust's name and tax number, and
• contain any other information that Revenue may reasonably require.