[paloalto]

Btw playing international rules in Nebraska
Starting the season with three Frosh in the lineup against top teams is going to be a learning experience.  However we do have excellent talent

What are the international rules compared to NCAA?

If they're using  the full complement of FIVB rules (which I find hard to believe) the main difference is the number of substitutions.  FIVB only allows 6 subs.  NCAA allows 15 subs.   While I haven't kept up with the rules in recent years, there are quite a number of less substantial differences; i.e. FIVB libero can't serve; NCAA libero can serve; FIVB up official can call his own video review challenge while NCAA can't.

There are those who advocate for universal, worldwide rules for the sport.  There are those who advocate in favor of NCAA/USAV rules on substitutions to provide more opportunities for short players.

[paloalto]

Btw playing international rules in Nebraska
Starting the season with three Frosh in the lineup against top teams is going to be a learning experience.  However we do have excellent talent

What are the international rules compared to NCAA?

If they're using  the full complement of FIVB rules (which I find hard to believe) the main difference is the number of substitutions.  FIVB only allows 6 subs.  NCAA allows 15 subs.   While I haven't kept up with the rules in recent years, there are quite a number of less substantial differences; i.e. FIVB libero can't serve; NCAA libero can serve; FIVB up official can call his own video review challenge while NCAA can't.

There are those who advocate for universal, worldwide rules for the sport.  There are those who advocate in favor of NCAA/USAV rules on substitutions to provide more opportunities for short players.