Disqualified List

A player can be placed on the Disqualified List if he violates the terms of his contract (for example, player signs a contract using a false name and/or DOB, or player signs a contract with another professional baseball team without permission of an MLB club while still under contract with that MLB organization, or player circumvents a drug test, or player refuses to undergo an examination by a physician as directed by the club, or player refuses to render services to the club).

A player can be placed on the Disqualified List only with the approval of the MLB Commissioner.

A player on the Disqualified List does not count against the club's Active List or Reserve List, and he does not accrue service time or get paid while on the list.

An MLB player on the Disqualified List cannot be reinstated during the period of time extending from August 1st through October 31st and a minor league player on the Disqualified List cannot be reinstated during the period of time extending from August 1st through the conclusion of his club's season (including post-season) without the approval of the MLB Commissioner.

A player reinstated from the Disqualified List must be added back to his club's Reserve List within 30 days if he is reinstated prior to the conclusion the season, or by Opening Day if the player is reinstated during the off-season.

If an MLB player on the Disqualified List is reinstated during th MLB regular season, he may consent to a "conditioning" assignment (with or without pay - TBD) with a minor league affiliate of his club for up to 30 days prior to being reinstated to the MLB Reserve List.
NOTE: A player receives MLB meal money and other benefits associated with being an MLB player while on a  minor league "conditioning" assignment.  

If a player is assigned to another club after reinstatement he must be placed on that club's Reserve List immediately.