1-3-1 — Modified the effective date that baseballs shall meet a NOCSAE performance standard. (Effective January 1, 2020).
6-1-3 — Modified an element of the pivot foot requirement.
Officials’ Signals — Created a signal for a 3- or 4-person mechanic to indicate the direction of rotation to the umpiring crew.
Officials’ Signals — Created a signal for a game umpire to alert his or her partner of relevant information.