Nikkan Sports is carrying an article about rules for the upcoming World Baseball Classic. The information comes from an Italian baseball/softball website.

tie-break rules will be used from the eleventh inning instead of the thirteenth inning.

each team can carry twenty-eight players on their main roster with thirteen or more pitchers and two or more catchers.

each team can carry ten alternate pitchers that can be used at any point during the tournament.

teams will have until February 6 to register players instead of January.

games will be called if one team has a lead of fifteen or more runs after five innings or ten or more runs after seven innings.

pitchers will be limited to sixty-five pitches during the First Round, eighty pitches during the Second Round, and ninety-five pitches during the Championship Round.

pitchers that throw fifty or more pitches in one outing will require four days of rest; pitchers that throw thirty or more pitches in one outing or that make appearances in consecutive days will require one day of rest.

after each game, two players will be selected for a drug test.

all sixteen participating countries will receive prize money with half going to the players.

Source: Nikkan Sports 11/19/2016

[UPDATE 11/24 @ 1:39am]

A preliminary roster of fifty players is due by December 1. It is uncertain if changes will be allowed. Samurai Japan is planning to include Koji Uehara, Kenta Maeda, Masahiro Tanaka, Yu Darvish, Junichi Tazawa, Hisashi Iwakuma, Norichika Aoki, Ichiro Suzuki, and Munenori Kawasaki in their preliminary roster.

Source: Sports Hochi 11/22/2016