New Delhi, May 23 -- Indonesia is overhauling its trade policies for key commodities in a sudden move that some experts liken to a hostile takeover of major industries in the resource-rich nation, with global implications.

The new regulation announced to parliament Wednesday by Indonesian President Prabowo Subianto mandates that a recently set up state-owned enterprise will handle the country's exports of coal, palm oil and iron alloys by September.

Prabowo said one aim is to increase tax revenues. That would help restore dwindling government reserves that have been exhausted by the energy shocks from the war in Iran. Given Indonesia's role as a major commodities exporter, the new rules likely will ripple across international supply cha...