Pittsburgh Penguins vs. Helsinki Jokerit - Exhibition game 2008.10.02 

Great question. This was a designated NHL preseason game. Despite larger ice and higher boards, they abided by NHL rules. I actually do not know how the rules differ exactly. Do you?

The referees are NHL referees so I'd guess they are more familiar with NHL rules so I'd consider it pretty likely that this was under NHL rules.

back then jokerit were in sm-liiga not khl