The third online competition for Pokémon Sun and Pokémon Moon has been announced. 2017 International Challenge February will take place from Friday, February 24, 2017, at 00:00 UTC, through Sunday, February 26, 2017 at 23:59 UTC. Full details are listed below and on our 7th Generation Online Competitions page which will be updated as new tournaments are announced.

2017 International Challenge February

logo
Information
Region: International
Registration Period: Thursday, February 16, 2017, at 00:00 UTC, through Thursday, February 23, 2017, at 23:59 UTC
Tournament Period: Friday, February 24, 2017, at 00:00 UTC, through Sunday, February 26, 2017, at 23:59 UTC
Max number of participants: 50 000
Ranking Results Announcement: March 2017
Player divisions: Junior/Senior Division: Born 2002 or later
Masters Division: Born 2001 or earlier
Junior/Senior Division players are limited to playing between 6 A.M. and 11 P.M., based on the easternmost time zone in each player’s country.
Compatible Games: Pokémon Sun and Pokémon Moon
Battle Type: Double Battle
Banned Pokémon: Players could only use Pokémon from the Alolan Pokédex. Only the Alola Form of Pokémon with regional variants could be used. Zygarde, Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma and Magearna could not be used. Mega Stones were not allowed.
Entry Gift: Qualified participants in the 2017 International Challenge February Online Competition will receive a Mawilite Mega Stone and a Beedrillite Mega Stone.
Description
The first International Challenge featuring the Pokémon Sun and Pokémon Moon games is here! The 2017 International Challenge February will use the same rules and regulations as Pokémon Video Game Championship Series events, and you can even earn Championship Points toward an invitation to the 2017 Pokémon Video Game World Championships in August.
Competition Rules
• Items are allowed, but Trainers may not have duplicate items in their Battle Team.
• Register three to six of your Lv. 1–100 Pokémon to your Battle Team.
• All Pokémon in this competition will automatically become Lv. 50 for the duration of each match.
• Three of the Pokémon you register to your Battle Team will be chosen to battle in each match.
• A 10-minute time limit for each player will automatically be enforced in-game, beginning at the start of each battle. When a player’s time limit expires, that player will lose the game.
• At the beginning of each battle, players have 90 seconds to select three Pokémon with which to battle.
• At the beginning of each turn, players have 60 seconds to select a move or change the Pokémon in battle. If a player has not made his or her selections at the end of this period, the game will automatically make selections for the player.
• Players may battle up to 15 games per day of the competition. Any unplayed games will carry over to the following day. A new day begins at 00:00 UTC.

Source: https://3ds.pokemon-gl.com/information/4cfcca44-671b-4cce-b818-e78a9d9075e5