In MLS, players who are not currently attached to any team must go through the discovery process for signing. This process involves each MLS team maintaining a specific list known as the "discovery list." On this list, teams can designate up to seven players for whom they have priority rights to sign ahead of other MLS teams. MLS roster regulations state that when another club expresses interest in a player on a team's discovery list and offers $50,000 in general allocation money for the player's discovery rights, the team in possession of the player's rights must respond promptly. They are required to make a "genuine, objectively reasonable offer" to retain the player on their discovery list within a three-day timeframe.