...just and reasonable rates the Commission shall initiate, modify, establish or adjust such rates so that carriers as a whole (or as a whole in each of...rate groups or territories as the Commission may from timo to time designate) will, under honest, efficient and economical management and reasonable expenditures...

...just and reasonable rates the Commission shall initiate, modify, establish or adjust such rates so that carriers as a whole (or as a whole in each of...aggregate annual net railway operating income equal, us nearly as may be, to a fair return upon the aggregate value of the railway property of such carriers...

...the carriers as a whole, or as a whole in each of the rate groups or territories designated by us, will, under honest, efficient, and economical management...equipment, earn an aggregate annual net railway operating revenue equal, as nearly as may be, to 5| per cent on the aggregate value of their property held for...

...just and reasonable rates the Commission shall initiate, modify, establish, or adjust such rates so that carriers as a whole (or as a whole in each of such rate groups or territariet as the Commission may from lime to time designate) will, under honest, efficient, and economical...

...such fair return, the commission shall endeavor to adjust the general level of rates so that operating carriers as a whole (or as a whole in each of such rate groups or tei tories as the commission may from time to time designate) will under normal conditions and under...

...later types. Id. (461). The Act provides that the rate structure shall comprehend and be based upon "honest, efficient, and economical management and...for maintenance of way, structures, and equipment," and it certainly implies that the "fair return" for the use of the property shall be measured on that...

...such excess cost was an unreasonable expenditure for maintenance of equipment and not in interest of efficient and economical management and reasonable...for maintenance of way, structures, and equipment, as required by section 15aof the act. Construction and Repair of Ry. Equipment, 721. EMBARGOES. Where...

...in tb« aggregate under section 1 of the act and would enable the earners in the respective groups, under honest, efficient, and economical management and reasonable expenditures for maintenance of war, structures, and equipment, to earn an aggregate annual railway opwmting income equal, as nearly...

...be found to exist. Reference to the section shows that the Commission must establish rates such as will "under honest, efficient and economical management...maintenance of way, structures and equipment," earn a fair return for the carriers. The report of the Commission to the Senate Committee on Interstate...

...carriers under its jurisdiction in the following manner: Either treating the carriers of the United States as a whole, or as a whole in each of such rate groups...as the Commission may from time to time designate, to fix the value, using certain prescribed methods, of the property devoted to the service of the public...