"Authority" - means, in any jurisdiction and on federal, regional or local level, any executive, government, any other supranational, national, state, federal, regional, municipal, city, town or local government, any subdivision, court, arbitral tribunal, central bank, administrative agency or commission or other authority thereof, any state enterprise or state corporation, any other entity controlled by a government, any quasi-governmental body exercising any regulatory, administrative, taxing, excise, customs importing or other governmental or quasi-governmental authority, any stock exchange or other regulatory or supervisory body or authority, any political party or any public international authority

"Taxation Authority" - means any Authority [or government or other public authority] having authority to collect Taxes, impose liability in connection with Taxes and otherwise in charge of enforcement of laws and rules relating to Taxes