The senior minister said here on Monday that his side in coordination with the national police will impose strict legal sanctions on violators.
"If someone wishes to conduct a transaction, it should be done using rupiah. I will ask the criminal and detective agency of the national police to enact the legal action," he said.
Earlier, the government had discovered that various financial transactions in Tanjung Priok, and some other ports, were being done using US dollar.
The US dollar is used in the seaports because financial or commercial transactions are conducted with international business partners from foreign countries.
"However (the use of rupiah) is a mandate of the law and must be obeyed," the minister added.
Reported by Indra Arief Pribadi