Here is the criteria for Rule 6.01(j) - Sliding to Bases on Double Play Attempts
The runner attempting to break up a double play must engage in a bona fide slide. This means the runner:
1) Begins his slide and makes contact with the ground before reaching the base;
2) Is able and attempts to reach the base with his hand or foot;
3) Is able and attempts to remain on the base (except home) after completing the slide; and
4) Slides within reach without changing his path for the purpose of initiating contact with a fielder.
Penalty: Failure to satisfy all four criteria of a bona fide slide is the already-existing double play interference.
Note: As has been interpretation in years past, the intent of the runner may be cause alone for an interference ruling. For instance, a runner may satisfy the new bona fide slide criteria, but if the umpire rules the runner intentionally attempted to initiate contact with the fielder, then double play interference may be called (Result: Both the runner and batter are out; dead ball, any remaining runners return to the base occupied at the time of the pitch).
Video Examples (the criterion that was not satisfied [for illegal plays] is indicated by text in italics):
Introducing the UEFL Videoboard: Click each thumbnail image for a video of the illustrated play.
Pace of Game: MLB also adopted a new 30-second time limit for mound visits by managers and pitching coaches. The clock will begin when the coach exits the dugout; when the time reaches zero, the meeting will be over.
MLB issued a Press Release accompanying the Rule 6.01(j) announcement.