The news may not come until Monday. They do have all of tomorrow to finalize the decision.
It cannot be on Monday, because that would be past the deadline set for the 11th of March 2017. Expect something during working hours today and if that does not happen, then a unlikely "default" yes decision would be accepted, because no decision was made.
This being such an important "rule change" decision and long awaited event, would justify a formal announcement.