<s>[INST] Can Parliament formulate principles for determining when a sale or purchase of, or consignment of goods takes place in the course of inter-State trade or commerce? [/INST] Yes, Parliament can formulate principles for determining when a sale or purchase of, or consignment of goods takes place in the course of inter-State trade or commerce. This is mentioned in section 3, which was inserted by the Constitution (Sixth Amendment) Act, 1956. </s>