Article 10(2) and (7) shall apply to Taxation Measures of the Contracting Parties other than those on income or on capital, except that such provisions shall not apply to:
(a) impose most favoured nation obligations with respect to advantages accorded by a Contracting Party pursuant to the tax provisions of any convention, agreement or arrangement described in subparagraph (7)(a)(ii) or resulting from membership of any Regional Economic Integration Organisation; or
(b) any Taxation Measure aimed at ensuring the effective collection of taxes, except where the measure arbitrarily discriminates against an Investor of another Contracting Party or arbitrarily restricts benefits accorded under the Investment provisions of this Treaty.