390 LAWS OF MARYLAND.

herein to the Commission, the burden of proof shall be upon
the party adverse to such Commission, or seeking to set aside
any determination, requirement, direction or order of said
Commission, to show by clear and satisfactory evidence that
the determination, requirement, direction or order of the Com-
mission complained of is unreasonable or unlawful, as the case
may be.

SEC. 47. And be it further enacted, That in all actions and
proceedings in Court arising under this Act, all processes shall
be served and the practice and rules of evidence shall be the
same as in civil actions, except as otherwise herein provided.
Every sheriff or other officer empowered to execute civil pro-
cesses shall execute any process issued under the provisions
of this Act, and shall receive such compensation therefor as
may be prescribed by law for similar services.

SEC. 48. And le it further enacted, That no person shall be
excused from testifying or from producing books, accounts
and papers in any proceeding based upon or growing out of
the provisions of this Act on the ground or for the reason
that the testimony or evidence, documentary or otherwise, re-
quired by him may tend to incriminate him or subject him to
penalty or forfeiture; but no person having so testified shall be
prosecuted or subjected to any penalty or forfeiture for or on
account of any transaction, matter or thing concerning which
he may have testified or produced any documentary evidence;
provided, that no person so testifying shall be exempted from
prosecution or punishment for perjury in so testifying.

SUBSTANTIAL COMPLIANCE SUFFICIENT.

SEC. 49. And be it further enacted, That a substantial com-
pliance with the requirements of this Act shall be sufficient to
give effect to all rules, orders, acts and regulations of the Com-
mission, and they shall not be declared inoperative, illegal or
void, for any omission of a technical nature in respect thereto.

POWER TO ENTER PREMISES.

SEC. 50. And be it further enacted, That the Commission,
its agents, experts and inspectors shall have power to enter
upon any premises occupied by any corporation to which the
provision of this Act or any of them are applicable, for the
purpose of making the examinations, inspections, valuations
and tests contemplated or provided for in this Act, and to set
up and use on such premises any apparatus and appliances and
occupy reasonable space therefor for the purpose of said ex-
aminations, inspections and tests.