2(1)The power conferred by paragraph 1 does not include power—U.K.
(a)to vary the amount chargeable by way of stamp duty on an excepted instrument, or
(b)to cause stamp duty to become chargeable on an excepted instrument.
(2)For the purposes of this paragraph—
(a)an “excepted instrument" is any document that is not a relevant property instrument, and
(b)a “relevant property instrument" is a document that (whether or not it also relates to any other transaction) relates to a transaction that to any extent involves—
(i)land, stock or marketable securities, or
(ii)any estate or interest in land, stock or marketable securities.