...affecting any rate, fare, or charge, the Commission shall have * * * authority * * * at once, * * * to enter upon a hearing concerning the lawfulness...fare, charge, classification, regulation, or practice; and pending such hearing and the decision thereon the Commission * * * may from time to time suspend...

...Commission is authorized and empowered upon complaint of any interested party or upon its own intiative at once and, if it so orders, without answer or other...hearing concerning the lawfulness of such rate, fare, or charge, or such rule, regulation, or practice, and pending such hearing and the decision thereon...

...Commission is authorized and empowered upon complaint of interested parties or upon its own initiative at once and, if it so orders, without answer or other formal pleading by the interested party, but upon reasonable notice, to enter upon a hearing concerning the lawfulness of such charge,...

...complaint, at once, and if it so orders, without answer or formal pleading by the natural-gas company, but upon reasonable notice, to enter upon a hearing concerning the lawfulness of such rate, charge, classification, or service ; and, pending such hearing and the decision thereon, the Commission,...

...complaint, at once, and if it so orders, without answer or formal pleading by the natural-gas company, but upon reasonable notice, to enter upon a hearing concerning the lawfulness of such rate, charge,, classification, or service ; and, pending such hearing and the decision thereon, the Commission,...

...value of the service thereunder, the Board is empowered, upon complaint or upon its own initiative, at once, and, if it so orders, without answer or other formal pleading by the air carrier, but upon reasonable notice, to enter upon a hearing concerning the lawfulness of such...

...and it is hereby given, authority either upon complaint or upon its own initiative without complaint, at once, and if it so orders without answer or other...fare, charge, classification, regulation, or practice ; and pending such hearing and the decision thereon the Commission, upon filing with such schedule...

...and it is hereby given, authority either upon complaint or upon its own initiative without complaint, at once, and if it so orders without answer or other...fare, charge, classification, regulation, or practice ; and pending such hearing and the decision thereon the Commission, upon filing with such schedule...

...hereby given, authority, either upon complaint or upon its own initiative without complaint, at once, if it so orders, without answer or other formal pleading by the interested carrier or carriers, and with or without notice, hearing, or the making or filing of a report, according as the Commission...

...complaint, at once, and, if it so orders, without answer or formal pleading by the public utility, but upon reasonable notice, to enter upon a hearing concerning the lawfulness of such rate, charge, classification, or service; ^and, pending such hearing and the decision thereon, the Commission,...