May a player enter into an agreement for a percentage of future transfer fees?

A player can indeed enter into an agreement regarding a percentage of future transfer fees, but this is specifically allowable when it pertains to their own future transfers. Under FIFA regulations, players have the right to negotiate terms that include remuneration based on future transfers they are involved in. This provision allows players to potentially maximize their financial benefit when they are transferred to another club, reflecting the player's interests and rights in their professional career.

The other options do not align with FIFA's regulations. For instance, players cannot receive percentages for transfer fees involving other players, nor can they assign such rights to agents in a manner that would contradict the rules prohibiting unjust enrichment or conflicts of interest in representation. Thus, the accurate understanding of the regulations emphasizes the player's autonomy in negotiating their agreements concerning their own transfers, underscoring the importance of protecting the player's financial interests within the framework set by FIFA.