5% TAX ON FOREIGN INCOME FOR NRI STARTING 2009 -10

I have recd a mail informing me that -

Government of India today 7 April 09  announced imposition of a flat 5% tax on all NRIs over their world-wide income. Income that is already taxed in India has been kept out of the purview to avoid double taxation. No double taxation benefits would be available for this 5% tax, meaning even if you are paying tax on your income in a country with which India has double taxation agreement, the benefit would not be allowed against this 5% tax. All those Indians who are holding Indian Passports and have been out of the country for more than 180 days during the year are under this requirement. Income proof would have to be submitted in form of employer certificates, foreign tax filings etc.

Is this true? Can anyone please quote any reference (sections, circulars or rules)

Thanks,

Anil.