[CompSci87]

So I guess the "international rules" were just the time-outs?  (Automatic at scores of 10 and 20, plus one per team per set.)
I didn't see anything else different.

No challenges on ball in/out. Automatically determined electronically

Oh, and they only switched sides once, after the second set.

And did the libero serve? They don’t under international rules

Yes, liberos were allowed to serve.

[CompSci87]

So I guess the "international rules" were just the time-outs?  (Automatic at scores of 10 and 20, plus one per team per set.)
I didn't see anything else different.

No challenges on ball in/out. Automatically determined electronically

Oh, and they only switched sides once, after the second set.

And did the libero serve? They don’t under international rules

Yes, liberos were allowed to serve.