15Stamp duty is not chargeable under this Schedule on any description of instrument in respect of which duty was abolished by—
(a)section 64 of the [1971 c. 68.] Finance Act 1971 or section 5 of the [1971 c. 27(N.I).] Finance Act (Northern Ireland) 1971 (abolition of duty on mortgages, bonds, debentures etc.), or
(b)section 173 of the [1989 c. 26.] Finance Act 1989 (life insurance policies and superannuation annuities).