A. A non-English speaking person who is a principal party in interest or a witness may at any point in any proceeding waive the right to the services of an interpreter, but only when such waiver is:
(1) approved by the appointing authority after he has explained the nature and effect of the waiver to the non-English speaking person through an interpreter; and
(2) made on the record after the non-English speaking person has consulted with his attorney.
B. At any point in any proceeding, a non-English speaking person may retract his waiver pursuant to Subsection A of this section and request an interpreter.