194 Ch. 30. No. 4.] Explosives. in particular, regulations declaring or regulating all or any of the following matters, that is to say— (a2) the notice or warning to be given by vessels having on board, or conveying, loading, or unloading gunpowder ; (b) the navigation and place of mooring of such vessels; (c) subject in cases in which the general miles with respect to packing in this Ordinance contained are applicable to such general rules, the mode of stowing and keeping gunpowder on board any such vessel, and of giving notice by brands, labels, or otherwise of the nature of the package containing the gunpowder; (d) the deseription, construction, fitting up, and licensing of the vessels or vehicles to be used for the conveyance of gunpowder, and the licensing and dress of the persons having charge thereof, (ce) prohibiting or subjecting to conditions and restrictions the keeping or conveyance of gunpowder with any explosive or any other articles or substances, or in passenger vessels, trains, or vehicles; (f) the places and times at which gunpowder is to be loaded or unloaded, and the quantity to be loaded or unleaded or conveyed at one time, or in one vessel or vehicle; (g) the mode of and the precautions to be observed in conveying any gunpowder, and the loading or unloading any vessel or vehicle conveying gunpowder, and the time during which gunpowder may be kept during such conveyance, loading, or unloading; (2) the times at which lights or fires are to be allowed or not allowed on board such vessels as before men- tioned, or at which a constable or other officer is to be on board them, (2) the publication and supply of copies of the regulations ; (7) enforcing the observance of this Ordinance; and (k) generally, for protecting, whether by means similar to those above mentioned or not, persons and property from danger.