“Since our first formal agreement signed in 2000, the Paralympic Games and the movement as a whole has grown beyond all recognition,” he said.
Meanwhile, North and South Korea’s decision not to march together at Friday night’s opening ceremony will have no bearing on efforts to support North Korean athletes, the IOC has said.
North Korea is represented by two cross-country skiers at their first winter Paralympics.
The two Koreas had marched together at the opening ceremony of last month’s Winter Olympics in symbolic moment of unification that was welcomed across the globe.
But they entered the stadium separately for the Paralympics after failing to agree on which version of the united flag to use.