This is the 2509th most frequent Turkish word.
mensuplarına
"To its members" or "to the members."
Here, 'mensuplarına' refers to 'members' and is used in the possessive form to indicate 'members of the federation'.
Federasyonun mensuplarına yeni görevler verildi.
New tasks were assigned to the members of the federation.
In this case, 'mensuplarına' designates 'members' belonging to the university, showing possessive relationship.
Üniversitenin mensuplarına özel erişim sağlanmaktadır.
Special access is provided to the members of the university.
Here, 'mensuplarına' refers to 'members' in the context of them belonging to the club, again exhibiting possession.