MONACO — The IOC approved a new Olympic bidding process Monday to make the system less costly and adopted a more flexible sports program that could lead to the inclusion of baseball and softball at the 2020 Tokyo Games.

The International Olympic Committee voted in favor of the new rules on the opening morning of a special two-day session to adopt President Thomas Bach’s 40-point “Olympic Agenda 2020” reform package, the biggest changes in the IOC in decades.

The IOC agreed to abolish the cap of 28 sports for the Summer Games and move to an “events-based” system that would allow new competitions to come in, while keeping to about 10,500 athletes and 310 medal events.