They were instated in the new first division following the Great War by the Football League
You might disagree with the basis of that decision, you might even be inclined to believe some of the scurrilous rumours surrounding Henry Norris at that time but you surely cannot question the legality of it?
Anyway, one much welcome benefit of that was to keep the Dark Side from White Hart Lane away from the top tier of English football
By the way you City fans do have a choice vocabulary all to yourselves, don't you?
Tarquins, Rags etc
No other clubs fans to my knowledge uses those terms
And a merry Christmas to you too!!