No Trade & No Movement Clauses

So in listening to and watching various NHL related shows on both TV and radio I have come to learn a thing or two about no trade clauses in the NHL. The first thing I learned is that there are lots of current players in the NHL who have them, perhaps as many as a 100 or more. The second thing I have learned is that there are at least two variations of the clause (there coud be more), those being the standard no trade clause and the other being the no movement clause.