A group of people representing an organisation or country, or a part of a military force. (Cambridge Dictionary)
Dependent on or conditioned by something else. (Merriam – Webster)
Likely but not certain to happen: Possible. (Merriam – Webster)
A contingent of police, soldiers, or military vehicles is a group of them. (Collins Dictionary)
A contingent is a group of people representing a country or organisation at a meeting or other event. (Collins Dictionary)
If something is contingent on something else, the first thing depends on the second in order to happen or exist. (Collins Dictionary)
Subject to chance. (Oxford Dictionaries)
Contingent upon and Subject to.