[Freddy]

There are very few shaded previously unannounced rules revisions in this year's new book.

One some might consider of significance is the addition of the underlined words to 4-40-1:
"A screen is legal action by a player who, while touching the playing court, without causing contact, delays or prevents an opponent from reaching a desired position."

As reported in a separate thread,
this was added to 9-9-1: "EXCEPTION: Any player located in the backcourt may recover a ball deflected from the frontcourt by the defense."
The correlating "COMMENTS OF THE 2018-19 RULES CHANGES" states (as previously announced):
"An EXCEPTION Added to the Backcourt Violation (9-9-1) - To ensure that an offensive team is not unfairly penalized when the ball is deflected by the deense from the frontcourt to the backcourt. This exception allows the offense to recover the ball (that still has frontcourt status) in the backcourt without penalty. This also makes the play situation on the deflected pass consistent with other codes with very similar team control and backcourt rules."

In 1-13-2, this sentence:
"At this point, a line drawn from the sideline toward the team bench becomes the end of the coaching box going toards the end line."
...is replaced with this sentence:
"A line, perpendicular to the 28-foot line and placed at each end, with a minimum length of 2 feet, shall be extended toward the team bench so that the coaching box boundary is evident."

2-7-11 is corrected now to read: "Reporting a team warning for head coach/bench personnel misconduct to the official scorer and then to the head coach of the offending team."

In 2-11-11, the word "rules" in the second to last sentence is replaced with the word "determines."

3-3-7 now includes this: "(See NFHS General Guidelines for Sports Hygiene, Skin Infections and Communicable Diseases in Appendix E on Page 84.)"