Original sentence: NHL rules restrict the total number of players per game to 18 plus two goaltenders.Under IIHF rules, each team may carry a maximum of 20 players and two goaltenders on their roster.While the general characteristics of the game are the same wherever it is played, the exact rules depend on the particular code of play being used
Edited sentence: In most competitive leagues, each team may carry at most 23 players on its game roster, two of whom are typically goaltenders.North American professional leagues restrict the total number of skaters who may dress for a game to 18 or fewer.The remaining characteristics of the game often depend on the particular code of play being used.This historical development is described masterfully in Ken Dryden's book "The Game