TwistofFate, please post a reference to these “Guidelines” you mention.
Meanwhile, I’ll set forth what FIFA has available officially regarding how the game is played, and what it says about equipment, since it is apparent that some here aren’t interested in taking the time to educate themselves on the actual truth, a funny concept on a site devoted to exactly that idea…
LAWS OF THE GAME
Law IV Players’ Equipment
You must wear jersey, shorts, socks, shinguards and shoes.
You can’t wear anything dangerous to others.
Shinguards must be totally covered by the socks.
Goalkeepers must wear colors which distinguish them from the other players and the referee.
Decisions of the IFAB regarding Law IV:
Referees must inspect equipment before the game begins.
Players can’t play with equipment that the referee determines violates Law IV.
A player made to leave the field of play in order to bring his/her equipment in compliance with Law IV cannot reenter until a stoppage of the game and only after the referee is satisfied the player is in compliance with the law.
A player who reenters without the referee’s permission shall be cautioned.
Additional Instructions Regarding the Laws of the Game:
23. Players’ outfits:
Referees must make sure players are in conformity with Law IV, must make them keep shirts tucked in and socks pulled up.
Visible undergarments, such as thermoshorts, can be worn, but only if they are of the same color as the predominant color of the shorts, and they cannot extend beyond the knee.
Questions and Answers to the Laws of the Game:
Law IV:
Referees do not have to let a player play with a bandage just because a doctor deems such a bandage medically necessary; if the referee feels the bandage is dangerous to other players, the referee can refuse to allow the player to play wearing it.
A goal scored by a player who loses a shoe colliding with another player is valid, because the player did not intentionally play without proper equipment.
If both goalkeepers have the same color on , and neither has an alternate shirt to wear, the referee should allow the game to proceed.
A referee may allow a player to wear glasses while playing, as long as they don’t create a danger to other players.
You now have every bit of official rules and information regarding equipment. Individual competitions are not allowed to have competition rules that modify these rules, except as to substitutions, number of players, size of field and ball, duration of play, and size of goal.
Now, I’m always willing to learn something new. Goodness knows I don’t ever pretend to know everything, and more knowledge is a good thing. So if someone has something official that addresses issues such as sleeve length for keepers, wearing of gloves, etc., I’m all for finding out about it!
But, I’ll warn you, there are many so-called “rules” that get passed on, even in the refereeing fraternity, for which there is no basis in actual fact. These “rules” often start as common sense generalizations and end up written in stone. But they have no basis in the official rules.