(1) This section applies for the purposes of sections 98, 112, 147, 156 and 171 if it is impracticable to work out the civilian daily earnings or pre - CFTS pay for a person.
(2) The civilian daily earnings or pre - CFTS pay for a person before the relevant date is the civilian daily earnings or pre - CFTS pay before that date of another person performing comparable work.
(3) In this section:
"relevant date" for a person means:
(a) if section 98 applies--the onset date for the person's incapacity; and
(b) if section 156 applies--the date the person last ceased to be a member of the Defence Force; and
(c) if section 112, 147 or 171 applies--the date the person began his or her last period of continuous full - time service.