THE BRITISH IMPERIAL OIL COMPANY THE
COMMISSIONER TAXATION Income Tax--Assessment-Board of Appeal-Validity of constitution of Board-
Judicial power of Commonwealth-Reference to Board-Case stated by Board- Tax on person in respect of business controlled abroad-Different subjects of taxation-Severability--The Constitution (63 &64 Vict. c. 12), secs. 55, 71- Feb. 24, 25.
Income Tax Assessment Act 1922-1923 (No. 37 of 1922-No. 27 of 1923), secs. 28, 41, 44, 48, 50-53--Income Tax Act 1922 (No. 38 of 1922)-Income Tax Act 1923 (No. 26 of 1923). April 9.
Held, by Knox C.J., Isaacs, Powers, Rich and Starke JJ., that the powers which the Income Tax Assessment Act 1922-1923 by secs. 44, 50 and 51 purports to confer upon a Board of Appeal created under sec. 41 of the Act are part of the judicial power of the Commonwealth, which under sec. 71 of the Constitution can only be vested in the High Court or a Federal Court, and that, a Board of Appeal not being such a Court, the conferring of those powers is ultra vires the Commonwealth Parliament and, therefore, that no Board of Appeal can be validly constituted under the Act, and the High Court cannot entertain a case purporting to be stated by a Board of Appeal pursuant to secs. 44 and 51 (6) of the Act.
Held, also, by Knox C.J., Isqacs and Rich JJ., that the tax purported to be imposed by the combined effect of sec. 28 (1) of the Income Tax Assessment Act 1922-1923 and the Income Tax Acts of 1922 and 1923 is a tax and that the subject of taxation is not different from that dealt with by the other provisions of those Acts, and therefore that those Acts are not in that respect obnoxious to the provisions of sec. 55 of the Constitution.
Per Isaacs and Rich JJ.: Sub-sec. 3 of sec. 28 of the Income Tax Assessment Act 1922-1923 is invalid, and therefore where a taxpayer is dissatisfied with