It shall belawful for the [F1library authority or museum and art gallery authority] to make byelaws for regulating all or any matters and things whatsoever connected with the control, management, protection, and use of any property, articles, or things under their control for the purposes of this Act, and to impose such penalties for breaches of such byelaws, not exceeding five pounds for each offence, as may be considered expedient; and from time to time, as they shall think fit, to repeal, alter, vary, or re-enact any such byelaws, provided always that such byelaws and alterations thereof shall not be repugnant to the law of Scotland, . . . F2, and shall be approved of and confirmed by the sheriff [F3exercising jurisdiction in the area of the authority:] Provided also, that nothing herein contained shall preclude the [F4library authority or museum and art gallery authority,] as the case may be, from recovering the value of articles or things damaged, or the amount of the damage sustained, against all parties liable for the same.