(1) This section shall apply to an instrument which -
(a) was first executed before the 1st day of November, 1991, and
(b) was unstamped or insufficiently stamped on the 30th day of January, 1992.
(2) Where an instrument to which this section applies is delivered for stamping to the Commissioners together with the unpaid duty -
(a) on or before the 30th day of June, 1992, such instrument shall be stamped without payment of penalty, or
(b) on or after the 1st day of July, 1992, but on or before the 30th day of September, 1992, such instrument shall be stamped on payment of a penalty calculated as if the instrument was first executed on the 1st day of June, 1992.
(3) Where an instrument to which this section applies is delivered to the Commissioners together with unpaid duty which is insufficient, or is found to be insufficient, by virtue of the revaluation of property to which the instrument relates or for any other reason, then -
(a) the provisions of subsection (2)(a) shall apply