In the case of Singapore, it is the Monetary Authority of Singapore, and in Hong Kong, the Hong Kong Securities and Futures Commission.

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The fine was the first levied against a major corporation by Singapore's central bank, the Monetary Authority of Singapore, under rules governing market misconduct introduced last year.

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"In the case of Indonesian banks in Singapore, this will be by way of a broader provision of financial services, both in wholesale banking and to, for example, Indonesian students and work permit holders in Singapore, " the Monetary Authority of Singapore said in a statement.

BBC: Indonesia approves DBS purchase of Bank Danamon stake

The Monetary Authority of Singapore reiterated its May 21 statement, saying it and Bank Indonesia are exploring further access into each other's markets, while Bank Indonesia Gov. Agus Martowardojo said the bank's position was unchanged and that "reciprocal" treatment is one of the considerations to allow DBS buy a bigger take in the Bank Danamon.

WSJ: DBS Group Extends Deadline on Takeover of Bank Danamon