Article 161 — Natural gas and hydro -electric power ................................ ........................ 86

(a) the net proceeds of the Federal duty of excise on natural gas levied at well -head and collected by the Federal Government, and of the royalty collected by the Federal Government, shall not form part of the Federal Consolidated Fund a nd shall be paid to the Province in which the well -head of natural gas is situated. (b) the net proceeds of the Federal duty of excise on oil levied at well -head and collected by the Federal Government, shall not form part of the Federal Consolidated Fund and shall be paid to the Province in which the well -head of oil is situated. ] (2) The net profits earned by the Federal Government , or any undertaking established or administered by the Federal Government from the bulk generation of power at a hydro -electric station shall be paid to the Province in which the hydro -electric sta tion is situated. Explanation .—For the purposes of this clause "net profits" shall be computed by deducting from the revenues accruing from the bulk supply of power from the bus -bars o f a hydro -electric sta tion at a rate to be determined by the Council of Common Interests, the operating expenses of the station, which shall include any sums payable as taxes, duties, interest or return on investment, and depreciations and element of obso lescence, and over -heads, and provision for reserves. 162. Prior sanction of President required to Bills affecting taxation in which Provinces are interested