After the World Championship 2014, the next major League of Legends tournament would be the one-time Expansion tournament. The number of teams from NA LCS and EU LCS will increase from 8 to 10 and they will conduct this one-time Expansion tournament to determine the final two teams that will make it into the 2015 LCS Spring Split for each region.
New movement policy
A new movement policy was introduced to all major professional and semi-professional leagues (e.g. LCS, OGN, LPL, etc.) and a residency requirement will be imposed for NA and EU teams. This policy will require teams from NA and EU to have at least three of their starting players present in any given game comply with the new residency requirement, and teams can still let foreign players into their roster for a maximum of 2 players.
The new residency requirement will limit player movement especially from forming a team comprised of mostly foreign players. Teams will have a balance combination of local and foreign players and such all major leagues – NA (LCS & CS), Europe (LCS & CS), China (LPL & LSPL), Korea (OGN, Masters, NLB), and SEA/Taiwan (GPL & LNL) – around the world will adopt this new policy.
A player is treated as a “Resident” of a region if the player has been residing in that particular region for at least 24 months prior to the game the player will participate.
Another motion in the Expansion Tournament is the acquisition restrictions. Amateur teams from the Ranked 5s ladder have a shot at one of the spot in the LCS without having to go through the Challenger Series while teams from Challenger Series can win a spot in the LCS by playing other Challenger Series teams or by playing amateur Ranked 5s teams.
These types of scenario are impossible in the past split and in regards to these distinct situations, Riot have placed acquisition restrictions on this tournament:
“No individual, organization, or legal entity with a stake in one or more teams playing in the Expansion Tournament may obtain an ownership stake in another Expansion Tournament team without divesting their previous stake(s).”
These prevent owners and individuals from buying a stake in two Challenger Series teams because it would not guarantee an advantage when progressing through the tournament.
For more information on the player movement and acquisition restrictions, see the official Riot post.