The Legislature declares that Sections 1201 to 1205, inclusive, are enacted as germane and cognate parts of and as aids to the jurisdiction vested in the commission for the supervision, regulation, and control of railroad and street railroad corporations in this State, and the Legislature further declares that the authority and jurisdiction thus vested in the commission involve matters of state-wide importance and concern and have been enacted in aid of the health, safety, and welfare of the people of this State.