...indicated upon the tariffs or schedules in force at the time, and kept open to the public inspection: Provided, That the Commission may, in its discretion and for good cause shown, allow changes in such tariffs or schedules upon less than thirty days' notice herein specified, or upon other conditions:...

...and prescribe by order such changes in the form of such schedules as may be found expedient, and to modify the requirements of this section in respect to publishing, posting and filing of schedules either in particular instances or by general order applicable to special or peculiar circumstances...

...shall be plainly indicated upon the schedules in force at the time and kept open to public inspection : Provided, That the Commission may, in its discretion...to special or peculiar circumstances or conditions: Provided further, That the Commission is hereby authorized to make suitable rules and regulations for...

...schedules in force at the time and kept open to public inspection : Provided, That the Interstate Commerce Commission may, in its discretion and for good cause shown, allow changes upon less notice than herein specified or modify the foregoing requirements in respect to publishing and posting...

...increase or decrease, and the time when the proposed changes will go into effect," it also provides "that the Commission may in its discretion and for good cause shown allow changes in tariffs and schedules upon less than thirty days' notice herein specified or 111*011 other conditions."...

...and prescribe by order such changes in the form of such schedules as may be found expedient, and to modify the requirements of this section in respect to publishing, posting and filing of schedules either in particular instances or by general order applicable to special or peculiar circumstances...

...schedules on file, specifying the class or commodity affected and the date when the same will take effect. "Provided, that the Commission may, in its discretion and for good cause shown, modify or suspend the requirements of this section in respect to posting changes in schedules, either...

...or modify the requirements of this act in respect to publicly posting notices and filing schedules either in particular instances or by a general order applicable to special or particular circumstances or conditions. § 4. It shall be unlawful for any such company to demand,...

...shall be plainly indicated upon the schedules in force at the time and kept open to public inspection: Provided, That the Commission may, in its discretion...to special or peculiar circumstances or conditions: Promded further, That the Commission is hereby authorized to make suitable rules and regulations for...

...shall be plainly indicated upon the schedules in force at the time and kept open to public inspection: Provided, That the Commission may, in its discretion...publishing, posting, and filing of tariffs, either iu particular instances or by a general order applicable to special or peculiar circumstances or conditions:...