If the worker at or
immediately before the date on which the worker is rendered less able to earn
full wages was employed in any process mentioned in column 2 of Schedule 4 and
produces a certificate from a medical practitioner that the loss of function
contracted is the loss or one of the losses in column 1 set opposite the
description of the process, such loss of function shall be deemed to have been
due to the nature of the employment, unless the employer proves the contrary.
[Section 54 amended: No. 42 of 2004 s. 39.]