A person employed under this Act may terminate the person's employment at any time by giving written notice to:

  (a)   if paragraph   (b) does not apply -- the employing individual; or

  (b)   if the CEO is exercising the powers of an employer under subsection   15(5) in relation to the person--the CEO.

Note:   The employing individual is the parliamentarian or office - holder who employed the person on behalf of the Commonwealth (see the definition of employing individual in section   3).