Notwithstanding the provisions of section 1 of the Act of 1891 and the provisions of the First Schedule, stamp duty shall not be chargeable on any instrument which is a conveyance, transfer, assignment, lease or licence of any immovable property situated outside the State:
Provided that such instrument does not relate to -
(a) any immovable property situated in the State, or any right over or interest in such property, or
(b) any stocks or marketable securities of a company having a register in the State.