“The Commissioners shall not be liable on a claim under this section a) to credit an amount to a person under subsection (1) or (1A) above, or b) to repay an amount to a person under subsection (1B) above, if the claim is made more than 3 years after the relevant date.”
“The relevant date is a) in the case of a claim by virtue of subsection (1) above, the end of the prescribed accounting period mentioned in that subsection, unless paragraph (b) below applies: b) in the case of a claim by virtue of subsection (1) above in respect of an erroneous voluntary disclosure, the end of the prescribed accounting period in which the disclosure was made;”