...shall engage in transportation under this Act over or by means of such additional or extended line of railroad, unless and until there shall first have...certificate that the present or future public convenience and necessity require or will require the construction, or operasion, to be followed when application...

...Furthermore, "no carrier .... shall abandon all or any portion of a line of railroad or the operation thereof unless and until there shall first have been obtained...certificate that the present or future public convenience and necessity permit of such abandonment." However, it is provided that such a certificate need not...

...subject to this act shall abandon all or any portion of a line of railroad, or the operation thereof, unless and until there shall first have been obtained...certificate that the present or future public convenience and necessity permit such abandonment. Appellant cited: Atlantic Coast Line RR Co, v. North Carolina...

...railroad subject to the act shall abandon any portion of its line of railroad or the operation thereof unless and until there shall first have been obtained...from the commission a certificate that the present and future public convenience and necessity permit of such abandonment. It further provides that from...

...subject to this act shall abandon all or any portion of a line of railroad, or the operation thereof, unless and until there shall first have been obtained from the Commission a certificate that the pres~ ent or future public convenience and necessity permit such abandonment. 'Appellant cited: Atlantic...

...system, or of any extension of such street railroad or line, plant, or system, without having first obtained from the commission a certificate that the present or future public convenience and necessity require or will require such construction: provided, that this section shall not be construed...

...of railroad, or of the operation thereof, by a carrier subject to the act is made unlawful, unless there shall first have been obtained from the commission a certificate that present or future public convenience and necessity permit of such abandonment. Any carrier proposing...

...system, or of any extension of such street railroad or line, plant, or system, without having first obtained from the commission a certificate that the present or future public convenicnce and necessity require or will require such construction; provided, that this section shall...

...shall engage in transportation under this Act over or by means of such additional or extended line of railroad, unless and until there shall first have...certificate that the present or future public convenience and necessity require or will require the construction, or operation, or construction and operation,...

...or by means of such additional or extended line of railroad, unless and until there shall first hare been obtained from the Commission a certificate that the present or future public convenience and necessity require or will require the construction, or operation, or construction and operation,...