9. Where a worker chooses, without the prior authorization of the Commission, to receive care or to undergo medical examinations more than 100 km from his residence when such care could be obtained or such examinations take place within a shorter distance, only the expenses corresponding to a trip of 200 km with an authorized personal vehicle in the case provided for in section 6 or with an unauthorized personal vehicle in every other case are reimbursable.
Such authorization may be granted where those expenses are more economical taking into account all the indemnities to which the worker would be entitled if he received care or underwent a medical examination 100 km or less from his residence.