"Today's proposals will ensure for the first time that all benchmark providers have to be authorized and supervised; they will enhance transparency and tackle conflicts of interests," he added.
The LIBOR scandal emerged last year when authorities realised banks including Royal Bank of Scotland, Barclays and Switzerland's UBS were submitting false data to gain market advantages for their own trades.
U.S. and U.K. regulators fined RBS more than $US460 million for rate-rigging. Barclays' role led to a $453 million fine and the resignation of chief executive, Bob Diamond. Swiss bank UBS was fined $1.5 billion.
The Commission's proposal targets the LIBOR and EURIBOR interest rates, but its scope includes many other benchmarks that are used to reference financial instruments. It foresees particularly tough oversight of all benchmarks used to reference instruments worth more than 500 billion euros.
An initial idea to hand oversight of the benchmarks like LIBOR and EURIBOR to a European agency was thrown out amid resistance from Britain which is home to the bloc's biggest financial industry and concerns that the relatively small European ESMA agency doesn't have the resources for the job, according to EU officials.
However, if national regulators cannot reach an agreement between them on a particular case, the Paris-based ESMA, or European Securities and Markets Authority, will be able to decide by binding mediation, according to the proposal.