There are UEFA statutes in which the criteria for membership in that organisation are next (on the 9th page):
So, a football association must represent and govern all maters related to football, on the territory of the sovereign state (recognized by the majority of the UN members) in order to become an UEFA member. That led to problems when Kosovo football federation (https://en.wikipedia.org/wiki/Kosovo_national_football_team) applied for the UEFA membership, because Serbian football association (https://en.wikipedia.org/wiki/Serbia_national_football_team) didn't want them to join (this is crude simplification), because they aren't full UN member.
I am wondering could UEFA membership criteria be changed in such a way that excludes the necessity for the representation of UN member by an independent football association? Also, how much would that formulation be practical, because almost all current UEFA members represents sovereign states?
I am interested in this because current criteria obviously leave legal space for political games to be played through this way.