Issues on the application
20 Section 24(1) of the SRC Act provides as follows:
'Where an injury to an employee results in a permanent impairment Comcare is liable to pay compensation to the employee in respect of the injury.'
21 The words 'impairment' and 'injury' are defined in s 4 of the SRC Act as follows:
'impairment means the loss, the loss of the use, or the damage or malfunction, of any part of the body or of any bodily system or function or part of such system or function.
injury means:
(a) a disease suffered by an employee; or
(b) an injury (other than a disease) suffered by an employee, being a physical or mental injury arising out of, or in the course of, the employee's employment; or
(c) an aggravation of a physical or mental injury (other than a disease) suffered by an employee (whether or not that injury arose out of or in the course of, the employee's employment (being an aggravation that arose out of, or in the course of, that employment;
But does not include any such disease, injury or aggravation suffered by an employee as a result of reasonable disciplinary action taken against the employee or failure by the employee to obtain a promotion, transfer or benefit in connection with his employment.'
22 There is a definition of 'disease' in s 4 of the SRC Act, but, for present purposes, it is not necessary to set out that definition. It is sufficient to say that the definition requires that there be a material contribution to the disease by the claimant's employment.
23 The 'injury' suffered by the applicant and arising out of or in the course of his employment for the purposes of his application under s 24 of the SRC Act was physical damage to his hearing faculties. The precise physical damage is not identified in the medical evidence. It is clear, however, that the injury came about because of noise trauma resulting from exposure to loud noise on 7 October 1970.
24 The 'commencing day' or the 'commencing date' as referred to in s 124 of the SRC Act is 1 December 1988. The respondent submitted that any impairment suffered by the applicant became permanent before 1988 and that therefore the transitional provisions in s 124 of the SRC Act were relevant. That section relevantly provides as follows:
'(1) Subject to this Part, this Act applies in relation to an injury, loss or damage suffered by an employee, whether before or after the commencing day.
…
(3) A person is not entitled to compensation under section 24 or 25 in respect of a permanent impairment, or under section 17 in respect of the death of an employee, being an impairment or death that occurred before the commencing date, if:
(a) The person received compensation of a lump sum in respect of that impairment or death under the 1912 Act, the 1930 Act or the 1971 Act; or
(b) The person was not entitled to receive compensation of a lump sum in respect of that impairment or death:
(i) where the impairment or death occurred before the commencement of the 1930 Act - under the 1912 Act;
(ii) where the impairment or death occurred after the commencement of the 1930 Act but before the commencement of the 1971 Act - under the 1930 Act as in force when the impairment or death occurred; or
(iii) in any other case - under the 1971 Act as in force when the impairment or death occurred.'
25 As far as the applicant's condition of hearing loss was concerned, it was submitted by the respondent that the applicant had already been compensated by way of lump sum under the 1971 Act and, by reason of the above provisions, he could not recover compensation for that impairment under the SRC Act.
26 As far as the applicant's other conditions were concerned, it was submitted by the respondent that they were not compensable under the relevant Act at the time the impairments occurred and, again by reason of the above provisions, the applicant could not recover compensation for those impairments under the SRC Act.
27 For the purposes of this application, the important concept is the date upon which the permanent impairment 'occurred'. A permanent impairment that occurred before the commencing day may develop to a point where there is a new or further impairment that may be the subject of a claim for compensation of a lump sum under s 24 of the SRC Act.
28 It is clear on the evidence that the applicant's impairment by way of hearing loss, for which he received compensation by way of lump sum under the 1971 Act, became permanent before 1 December 1988. It appears that the impairment by way of hearing loss has deteriorated or worsened since 1 December 1988.
29 It is also clear on the evidence that the applicant's impairment by way of tinnitus became permanent before 1 December 1988. It was, of itself, not a compensable condition under the 1930 Act or the 1971 Act. It is not clear whether the impairment by way of tinnitus has deteriorated or worsened since 1 December 1988, but for present purposes I will assume that it has.
30 The question whether compensation of a lump sum for the deterioration or worsening of an impairment which occurred before 1 December 1988 is payable under the SRC Act is to be answered by reference to the transitional provisions in s 124 of that Act and the principles which have been identified in a number of authorities. It is enough for me to refer to two authorities.
31 In Department of Defence as Delegate of Comcare v West (1998) 156 ALR 651, the question was whether a deterioration in the claimant's lumbar spine and an impairment in both legs were new impairments for the purpose of a claim for compensation under the SRC Act. Merkel J (with whom O'Connor J agreed) stated the relevant principles in the following passages from his reasons for judgment (at 668 and 669):
'The present state of the authorities can be summarised as follows:
· the gradual worsening of a permanent impairment in accordance with its natural progress does not constitute a series of new impairments each giving rise to a separate liability to pay compensation: see Blackman at 14 and Brennan at FCR 570-1 per Gummow J; cf Brennan at FCR 558-9 per Burchett J;
· the observation in Blackman at 14 that a permanent impairment which worsens significantly or is such that the variation between it and the earlier permanent impairment is substantial does not result in a new permanent impairment is to be approached with "some caution": see Brennan at FCR 558-9 and 560-1 per Burchett J and at 571 per Gummow J and Levett at FCR 20.
The present case requires resolution of the question left unresolved in the current state of the authorities, that is, whether a deterioration in a permanent impairment which existed as at 1 December 1988 is capable of constituting a new permanent impairment.
The caution expressed in relation to Blackman by Burchett and Gummow JJ in Brennan and adopted by the Full Court in Levett suggests a reluctance to accept that a substantial variation, or a significant deterioration, in a person's permanent impairment is incapable of constituting a permanent impairment which is different to that which existed prior to the variation or deterioration.