Players may not participate while wearing jewellery. Religious medals or medical alert medals are not considered jewellery. A religious medal must be taped and worn under the uniform. A medical alert medal must be taped and may be visible. Allow a player to participate while wearing a head covering, if it is worn for medical or religious reasons, provided that the covering is not abrasive, hard, or dangerous, and is attached in such a way that it is highly unlikely to come off during play. Any long pieces of material must be tucked in the back of the jersey.