The NRL can have crowds of up to 40,000 at finals matches after the NSW Government allowed major venues to operate at 50 percent capacity.
Under the new rules, ANZ Stadium will be allowed 40,000 fans at matches from October 1 which will include the NRL grand final.
The SCG will also be able to have crowds of up to 23,000, while Bankwest Stadium will be able to accommodate 15,000 spectators.
Fans will have to wear masks on entry to the stadium but can take them off once in their allocated seat.
Suburban grounds such as Panthers Stadium and McDonald Jones Stadium will remain at 25 per cent capacity, however there is a hope that will change.
"We're hopeful we'll be able to get to those venues opening up to larger capacities," Minister for investment and tourism Stuart Ayres said.
"All have hills, we want to be able to make sure we work through what it the most appropriate way to open up that venue.
"Optimistically I would like to say they will be open for the 1st October, but we won't be putting people at risk."
The government's decision will also be welcomed by Rugby Australia after the governing body last week won the right to host the Rugby Championship.
All but one round of the tournament will be held in NSW, with ANZ Stadium and Bankwest Stadium RA's favoured locations.
A final draw for the tournament is still to be released.