(1) Chapter 1 of Part VI of the Finance Act, 1993, is hereby amended by the insertion after section 115 of the following section -
(1) Where the spouse of a deceased survives the deceased, probate tax chargeable by virtue of section 110 which is borne by property which, at the date of death of the deceased, represents the share of that spouse in the estate of the deceased, shall be abated to a nil amount:
(a) where the same property represents more than one person's share in the estate of the deceased and that spouse's interest in that property at that date is not a limited interest to which paragraph (b) relates, only a proportion of the probate tax borne by that property shall be abated to a nil amount and that proportion shall be the proportion which the value of that interest at that date bears to the total value of the property at that date, and for this purpose the value of that interest at that date shall not include the value of any interest in expec