CATCHWORDS Re Culleton Constitutional law (Cth) – Judicial power – Election of Senator – Validity – Court of Disputed Returns – Power to hear petition – Whether non-judicial – Constitution, Ch III – Commonwealth Electoral Act 1918 (Cth), Pt XXII, Div 2. Practice and procedure – High Court of Australia – Failure to raise argument at hearing – Principles applicable – Validity – Commonwealth Electoral Act 1918 (Cth), Pt XXII, Div 2. Constitution, ss 44(ii), 44(iii), 45, 47. Commonwealth Electoral Act 1918 (Cth), Pt XXII.