What powers and duties can be conferred on an authority appointed for the purposes of articles 301 to 304, according to article 307?
According to article 307, powers and duties that can be conferred on an authority appointed for the purposes of articles 301 to 304 include:

1. Implementing policies or measures related to trade, commerce, and intercourse among States in accordance with the provisions of articles 301 to 304.
2. Ensuring non-discrimination between goods imported from other States or Union Territories and similar goods manufactured or produced within the State, as per article 304(a).
3. Imposing reasonable restrictions on the freedom of trade, commerce, or intercourse with or within the State if required in public interest, as per article 304(b).
4. Monitoring and enforcing laws related to State monopolies and existing laws affecting trade and commerce, as per article 305.