27. Where the worker was at the date of the accident under twenty-one years of age, and the review above provided for takes place more than six months after the accident, the amount of weekly payment may be increased to the sum to which he would have been entitled if his average earnings had at the date of the accident been equal to what, if he had not been injured, he would probably have been earning at the date of the review.
R. S. 1964, c. 159, s. 26; 1978, c. 57, s. 1.