No jewelry, watches, chains, etc. This includes religious ornamentation. This is necessary for the safety of everyone on the mat. If you must leave the mat for any reason during practice please ask permission from the instructor first. Keep fingernails and toenails clipped.
Long nails are dangerous for everyone practicing.
Line up in rank order only at the beginning and end of the class. During class there is no need to sort yourselves by rank. The only way to sit in class is seiza or cross legged. Do not lean on the walls. Do not slouch.