A cast may be pieces of wood, or reeds, which are arranged and tied to the injured part to allow the broken bones to heal.

Bandages, plasters, ointments (Ointments here means those which, when dry up, form a water proof insulating layer) and the like follow the same rules as casts.

A cast must not be put on any sound part except that which is necessary to hold the cast in place.

The cast should be worn in a state of complete purity.

Otherwise, if there is no harm in removing the cast, one should remove it and put it on again after purifying and make it as large as the injury plus only what is needed to hold it in place.