a) No person may describe in any required maintenance entry or form, an aircraft or other aircraft component as being rebuilt unless it has been:(1) Disassembled, cleaned, inspected as permitted;(2) Repaired as necessary; and(3) Reassembled and tested to the same tolerances and limits as a new item, using either new parts or used parts that either conforms to new part tolerances and limits, or to approve oversized or undersized dimensions.