The announcement, which has been long awaited by casino executives, investors and analysts, puts an end to concerns that the government would change the status quo for the number of operators in the Chinese controlled territory.
The former Portuguese colony is the world's biggest gambling hub in terms of money wagered.
It massively tightened scrutiny of casinos in recent years, with authorities clamping down on illicit capital flows from mainland China and targeting underground lending and illegal cash transfers.
A casino executive familiar with the legislation said the government decided not to proceed with the proposal for a government official to directly supervise the casinos after feedback from the operators.
The licences of the six operators, Wynn Macau, Sands China, MGM China, SJM Holdings, Galaxy Entertainment and Melco Resorts, are all due to expire in June this year.
Shares of U.S. casino companies Las Vegas Sands Corp and Wynn Resorts Ltd jumped 10 percent, while MGM Resorts International was up four percent before the opening bell. U.S.-listed shares of Melco were up 12 percent.
The government said all existing or potential operators need to apply through a new tender process. It did not detail when operators will have to bid or whether the current licence term will be extended, according to a notice posted on its website.
Casino operators must increase the amount of capital to five billion patacas (US$623.67 million) from 200 million patacas and increase the requirement for a Macau based director of the company to hold 15 percent from 10 percent.
Macau's casino stocks lost billions in market value last September ahead of a 45-day public gaming consultation to gage public consensus over new licences.
The consultation focused on nine areas including the number of licences, employee welfare, as well as introducing government representatives to supervise day to day operations at the casinos.
Beijing, increasingly wary of Macau's acute reliance on gambling, has not yet indicated how the licence rebidding process will be judged. To appeal to authorities, operators have tried to bolster their corporate responsibility and diversify into non-gaming offerings.
(US$1 = 8.0170 patacas)
The patriarch and founder of Clarence Thomas Limited has passed.