Section 959AA of the Principal Act is amended by inserting the following after subsection (2) -
"(2A) Notwithstanding subsection (1) and section 959AB(1), a Revenue officer may, at any time, make or amend an assessment for a chargeable period to give effect to a mutual agreement reached, under an arrangement having the force of law by virtue of section 826(1), between the competent authority of the State and a competent authority of another jurisdiction and tax shall be paid or repaid (notwithstanding any limitation in section 865(4) on the time within which a claim for repayment of tax is required to be made) where appropriate in accordance with any such assessment or amended assessment.".