Referees have the discretion to judge on a match-by-match basis whether players' haircuts are acceptable.
Officials in the UAE are strict about compliance with the rules as they are concerned about the styles influencing kids watching in the stands.
Confusion still reigns over what styles are exactly forbidden under the new legislation.
Al-Ain star Omar Abdulrahman has been told he is exempt from the haircut law for his flowing locks.
However, Al-Wahda's Suhail Al-Mansoori, who sported a very similar style was forced to cut his hair under the laws of the game.
Many foreign players moving to Gulf countries to play their football have fallen foul of the rule in recent years.
Last year, goalkeeper Waleed Abdullah was forced into a pre-match haircut pitchside after officials picked up on the design on his head.
Former Sunderland striker Gyan has made eight appearances in the UAE Gulf League, scoring twice.