(c) The group and category to which the wage earner has been assigned by the valuation commission.
6. Upon the discharge of a wage earner, his labor booklet shall under no circumstances be withheld from him. Whenever an old booklet is replaced by a new one, the former shall be left in possession of the wage earner.
7. In case a wage earner loses his labor booklet, he shall be provided with a new one into which shall be copied all the entries of the lost booklet; in such a case a fee determined by the rules of internal management may be charged to the wage earner for the new booklet.
8. A wage earner must present his labor booklet upon the request:
(a) Of the managers of the enterprise, establishment or institution where he is employed;
(b) Of the Department of Labor Distribution;
(c) Of the trade unions;
(d) Of the officials of workmen's control and of labor protection;
(e) Of the insurance offices or institutions acting as such.
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