How does sub-clause (b) deal with foreign exchange, import and export?
Sub-clause (b) does not directly deal with foreign exchange, import and export. The context refers to clause (1), which is related to the power of the Parliament to make laws with respect to certain matters. Among these matters is foreign exchange, import and export across customs frontiers, as mentioned in sub-clause (b). However, sub-clause (b) specifically discusses the jurisdiction, powers, and authority that can be exercised by tribunals established under a law made under clause (1), but not the matter of foreign exchange, import, or export itself.