There is no import rule used in the NHL or pro minor leagues. The junior leagues in Canada , however, only allow two non-North Americans on each team's roster.
No slashing a player with your stick.
Footwork rule is a term used in sports that applies to the player in possession of the ball and who is limited in movement. Foot rule has a different interpretation depending on the sport.
The puck must enter the net before the player
this is not necessarily a rule, it is for safety. If a player loses a helmet, it is the most important and protective piece of equipment. losing gloves or a stick is not as important, or dangerous for that matter.
The offside rule is used in winter sports such as American football and ice hockey.
you don't score a hit in hockey
There are 412 dints in an official hockey ball according to the field hockey rule book.
The sport of ice hockey, in the Winter Olympics, has an offside rule.
Hockey
There is currently no offside rule in field hockey. There were prior offside rules, rules that restricted the positioning of players from the attacking team in a way similar to the offside rule in soccer. The offside rules were changed as the rules of field hockey changed. The evolution of the field hockey offside rule culminated with its abolition in the mid 1990s.
Ice hockey
What rule in particular? Check this link out - the NHL Official Rule Book http://www.nhlofficials.com/rules.asp