54. Determination of question of disablement
Any question-

(a) whether the relevant accident has resulted in permanent disablement; or

(b) whether the extent of loss of earning capacity can be assessed provisionally or finally; or

(c) whether the assessment of the proportion of the loss of earning capacity is provisional or final; or

(d) in the case of provisional assessment, as to the period for which such assessment shall hold good, shall be determined by a medical board constituted in accordance with the provisions of the regulations and any such question shall hereafter be referred to as the "disablement question".