MISCELLANEOUS BILLS. 353
PRACTICE BEFORE THE COMMISSION.

SEC. 10. And be it further enacted, That all hearings before
the Commission or Commissioner shall be governed by rules
to be adopted and prescribed by the Commission. And in all
investigations, inquiries or hearings the Commission, or a
Commissioner, shall not be bound by the technical rules of
evidence. No person shall be excused from testifying or from
producing any books or papers in any investigation or inquiry
by or upon any hearing before the Commission or any Com-
missioner, when ordered to do so by the Commission, upon the
ground that the testimony or evidence, books or documents
required of him may tend to incriminate him or subject him to
penalty or forfeiture; but no person shall be prosecuted, pun-
ished or subjected to any penalty or forfeiture for or on
account of any act, transaction, matter or thing concerning
which he shall, under oath, have, by order of the Commission
or a Commissioner, testified or produced documentary evi-
dence; provided, however, that no person so testifying shall
be exempt from prosecution or punishment for any perjury
committed by him in his testimony. Nothing herein contained
is intended to give, or shall be construed as in any manner
giving unto any corporation immunity of any kind from the
law.

REHEARING : SERVICE AND EFFECT OF ORDERS OF THE COM-
MISSION.

SEC. 11. And be it further enacted, That after an order has
been made by the Commission, any party interested therein
may apply for a rehearing in respect to any matter determined
therein, and the Commission may grant and hold such a rehear-
ing if, in its judgment, sufficient reason therefor be made to
appear; if a rehearing shall be granted, the same shall be
determined by the Commission within thirty days after the
same shall be finally submitted. Any application for such
a rehearing shall not excuse any common carrier, railroad
corporation, or street railroad corporation, or any other cor-
poration or company or person, subject to any of the provisions
of this Act, from complying with or obeying any order, or
any requirements of any order of the Commission, to operate in
any manner to stay or postpone the enforcement thereof, ex-
cept as the Commission may by order direct. If, after such
rehearing and consideration of the facts, including those aris-
ing since the making of the order, the Commission shall be of
opinion that the original order, or any part thereof, is in any
respect unjust or unwarranted, the Commission may abrogate,
change or modify the same. An order made for any such