The rules of hockey, although they have evolved, have largely stayed the same when it comes to things like penalties and majors. When a major is assessed, a team can score as many times as they would like within 5 minutes; on a minor, a team scores, and the penalty ends.
The Champions Hockey League has made rule changes that treat minor penalties like majors in that the opposing team can score as many times within the 2 minutes as they would like, and the penalized player must stay in the box.
A delayed penalty, if the attacking team scores, doesn't negate the penalty. Instead, the penalty must still be served.
First of all, this rule change seems to be to drive offence, making teams feel it more when they take a penalty, but I'm not sure I agree with minor penalties being treated the same as majors.
