When a person first becomes a healer they are called an intern till the time they pass a test involving a mock heal. once licensed they are called a healer
When a healer is brought to someone in need of healing they must state their script including their reg # in order to receive their pay. They will have 4 attempts to heal the hit points of damage. If they are unable to reach the full heal then another healer may make an attempt to complete the heal, otherwise the healer must wait 24 hours before trying again.
If there is someone killed, the healer is asked to perform the heal before a shamen can rezz the person. This is the humane thing to do as if someone were rezzed before being healed they would bear the pain of their injuries and most likely die again from the injuries.
While it is required for Healers and Shamen to have their Healers Reg, anyone may apply for one. This is beneficial to the guilds, the more healers the faster the warriors can return to fighting.