916                                 Laws of Maryland                         [Ch. 613

manner which the Commission shall prescribe. For the purposes
of its rules and regulations, the Commission may classify persons
and matters within its jurisdiction and prescribe different require-
ments for different classes of persons or matters. All rules and
regulations of the Commission shall be filed with its secretary and
shall be kept open in convenient form for public inspection and
examination during reasonable business hours.

Reconsideration of Orders.

299. Any person affected by any final order or decision of the Com-
mission may, within thirty days after the publication thereof, file
with the Commission an application in writing requesting a recon-
sideration of the matters involved, and stating specifically the errors
claimed as grounds for such reconsideration. No person shall in any
court urge or rely on any ground not so set forth in such application.
The Commission, within thirty (30) days after the filing of such
application, shall either grant or deny it. If such application is
granted, the Commission, after giving notice thereof to all interested
persons, shall, either with or without hearing, rescind, modify, or
affirm its order or decision. The filing of such an application shall act
as a stay upon the execution of the order or decision of the Commis-
sion until the final action of the Commission upon the application,
except that upon written consent of the applicant such order or deci-
sion shall not be stayed unless otherwise ordered by the Commission.
No appeal shall lie from any order of the Commission until an appli-
cation for reconsideration has been made and determined.
Judicial Review

300. (a) Any party to a proceeding under this sub-title aggrieved
by an order issued by the Commission in such proceeding may obtain
a review of such order in the court of appeals of the United States
for the fourth circuit, or in the United States Court of Appeals for
the District of Columbia, by filing in such court, within sixty (60)
days after the order of the Commission upon the application for re-
hearing, a written petition praying that the order of the Commission
be modified or set aside. A copy of such petition shall forthwith be
served upon any member of the Commission and thereupon the Com-
mission shall certify and file with the court a transcript of the record
upon which the order complained of was entered. Upon the filing of
such transcript such court shall have exclusive jurisdiction to affirm,
modify, or set aside such order. The finding of the Commission as to
the facts, if supported by substantial evidence, shall be conclusive. If
any party shall apply to the court for leave to adduce additional evi-
dence, and shall show to the satisfaction of the court that such addi-
tional evidence is material and that there were reasonable grounds for
failure to adduce such evidence in the proceedings before the Com-
mission, the court may order such additional evidence to be taken
before the Commission and to be adduced upon the hearing in such
manner and upon such terms and conditions as to the court may seem
proper. The Commission may modify its findings as to the facts by
reason of the additional evidence so taken, and it shall file with the
court such modified or new findings, which if supported by sub-
stantial evidence, shall be conclusive, and its recommendation, if any,
for the modification or setting aside of the original order. The court
may affirm or set aside any such order of the Commission, and state
the reasons therefor, and such judgment shall be final, subject to