The NFL operates several other drafts in addition to the NFL draft. The league holds a supplemental draft annually. Clubs submit emails to the league stating the player they wish to select and the round they will do so, and the team with the highest bid wins the rights to that player. The exact order is determined by a lottery held before the draft, and a successful bid for a player will result in the team forfeiting the rights to its pick in the equivalent round of the next NFL draft. Players are only eligible for the supplemental draft after being granted a petition for special eligibility. The league holds expansion drafts, the most recent happening in 2002 when the Houston Texans began play as an expansion team. Other drafts held by the league include an allocation draft in 1950 to allocate players from several teams that played in the dissolved All-America Football Conference and a supplemental draft in 1984 to give NFL teams the rights to players who had been eligible for the main draft but had not been drafted because they had signed contracts with the United States Football League or Canadian Football League.