Traditional tests between New Zealand and Australia will also be retained in the proposal, but no mention was made of the Denver test after England beat New Zealand 36-18 in a historic game at Mile High Stadium last month.
Both England and New Zealand signed a three-year contract with Denver test organiser and promoter Moore Sports, but it's understood that arrangement is subject to annual reviews.
The NRL's plan will be presented to the Rugby League International Federation meeting in Singapore later this month, and consultation will continue between the Rugby League Players Association, the New Zealand Rugby League, Rugby Football League and other key stakeholders before the calendar is finalised.
Australian Rugby League chairman Peter Beattie said the proposed calendar would provide regular opportunities for Pacific nations to compete on the bigger stage in tournaments.
"We saw during the World Cup how the Pacific Nations emerged as genuine rivals for the top tier nations – and thrilled fans at the same time," said Beattie.
"However, until now, there has not been enough structure around the international calendar and the game has missed some real opportunities to showcase Rugby League outside Australia.
"We are presenting a four-year calendar which can be repeated and replicated in future cycles to give the international game more certainty and exposure.
"Those tournaments and events will be bookended by a World Cup every four years.
"A key to this proposal is that we are giving emerging nations the opportunity to become genuine competitors with the tier one nations.
"But we will do it by confining international tournaments to fixed windows to ensure the wellbeing of our players."
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