50. The maximum amount of income of eighteen thousand dollars contemplated in section 27 is revalorized in the manner hereinafter described.
At the end of the financial year of the Régie, the maximum rate of annual income is equal to one hundred and fifty per cent of a yearly average computed on the basis of the average weekly earnings of the industrial composite in Québec as established by Statistics Canada for each of the twelve months preceding 1 July of the year preceding the year for which the maximum rate of annual income is computed.
The maximum rate of annual income is rounded off to the next highest five hundred dollars.
Where a new method is adopted by Statistics Canada to determine the average weekly earnings for a given month, by modifying either the time basis or the content basis, and the yearly average computed in accordance with the data of the new method is more than one per cent higher or lower than that computed in accordance with the data of the former method, the average weekly earnings to be used to establish the yearly average for each of the years affected by the change of method shall be adjusted by the Régie in such a way as to take into account the data gathered according to the method in use by Statistics Canada on 1 March 1978.
For the application of this section, the Régie shall use the data supplied by Statistics Canada on 1 October of the year in which the twelve-month period serving as the basis for computing the maximum rate of annual earnings terminates.