Biggest rules/mechanics changes of the last 5 years

[BillyMac]

1-20 NEW: Non-playing personnel, e.g., spirit participants, media, shall remain outside of the playing area during a 30-second or less time-out during the game. Non-playing personnel shall stand outside the free throw lane lines extended toward the sidelines throughout the game.

2-12-5: Sound a warning signal to begin the 15 seconds (maximum) permitted for replacing a disqualified or injured player, or for a player directed to leave the game.

3-5-6: Undershirts shall be a single solid color similar to the torso of the jersey and shall be hemmed and not have frayed or ragged edges. If the undershirt has sleeves, they shall be the same length. See 3-6 for logo requirements.

DELETE 3-5-7: (Compression shorts shall be a single solid color similar to the predominant color of the uniform; the length shall be above the knee. Undergarments shall not extend below the pants/skirt. See 3-6 for logo requirements.)

9-1-3h NEW: Players occupying marked free-throw lane line spaces may not enter the free-throw semicircle until the ball touches the ring or until the free throw ends.