45(1)References in this Part to a tax of the United Kingdom are to income tax or corporation tax.U.K.
(2)References in this Part to a tax of a territory outside the United Kingdom are to a tax chargeable under the law of that territory that—
(a)is charged on income and corresponds to United Kingdom income tax, or
(b)is charged on income or chargeable gains or both and corresponds to United Kingdom corporation tax.
(3)For the purposes of this paragraph a tax chargeable under the law of a territory outside the United Kingdom does not fail to correspond to income or corporation tax just because—
(a)it is chargeable under the law of a province, state or other part of a country, or
(b)it is levied by or on behalf of a municipality or other local body.