I think your link got mangled in the shortcut. Let's see if this works.
https://sup.arbitersports.com/Groups/104484/Library/files/2018_2019_WSB_Rules_Changes_20170817.pdf
Looks like the one posted before yours has one key difference. It states (emphasis mine):
When you cut and paste from the PDF you lose the strike through font. I couldn't figure out how to add it back in. I added the extra words or it would not have made sense.
We are all looking at the same document.
This is a big change but not unexpected.
It was the same proposal and reasoning offered to ASA's council a few years ago, but received next to no support from anyone except the umpire's committee. Maybe this will give them a nudge to move in the same direction
Yes...this proposal along with a rule change proposal to allow female pitchers to leap were both defeated at the 2014 Council Meeting.
In asking around the meeting after the vote, the main reasons I heard were that many members were not ready to make such drastic changes without the other major sanctioning bodies (NFHS and NCAA) doing the same. May it will come up this year again.
How much do you think the changes to 11.2.5, 11.15.1 and 11.21.4 affects a slapper's game?