HERBERT R. O'CONOR, GOVERNOR. 641

576F. Witnesses' Privileges. No person shall be ex-
cused from attending and testifying, or producing any
books, papers, or other documents before any court, mag-
istrate, or grand jury upon any investigation, proceeding;
or trial, for or relating to or concerned with a violation of
any Section of this Act or attempt to commit such violation,
upon the ground or for the reason that the testimony or
evidence, documentary or otherwise, required of him by
the State may tend to convict him of a crime or to subject
him to a penalty or forfeiture; but no person shall be prose-
cuted or subjected to any penalty or forfeiture for or on
account of any transaction, matter or thing concerning
which he may so testify or produce evidence, documentary
or otherwise, and no testimony so given or produced shall
be received against him, upon any criminal investigation,
proceeding or trial, except upon a prosecution for perjury
or contempt of court based upon the giving or producing of
such testimony.

576G. Unlawful Entry or Property. Any individual,
partnership, association, corporation, municipal corpora-
tion or State or any political subdivision thereof engaged
in, or preparing to engage in, the manufacture, transpor-
tation or storage of any product to be used in the prepara-
tion of the United States or of any of the States for defense
or for war or in the prosecution of war by the United
States, or by any country with which the United States
shall then maintain friendly relations, or the manufac-
ture, transportation, distribution or storage of gas, oil,
coal, electricity or water, or any of said natural or artificial
persons operating any public utility, whose property, ex-
cept where it fronts on water or where there are en-
trances for railway cars, vehicles, persons or things,
is surrounded by a fence or wall, or a fence or wall
and buildings, may post around his or its property at each
gate, entrance, dock or railway entrance and every one
hundred (100) feet of water front a sign reading "No
Entry Without Permission". Whoever without permission
of such owner shall wilfully enter upon premises so posted
shall, upon conviction, be deemed guilty of a misdemeanor,
and be punished by imprisonment for not more than ten
(10) days, or a fine of not more than fifty dollars ($50. 00),
or both.

576H. Questioning and Detaining Suspected Persons.

Any peace officer or any person employed as watchman,

guard, or in a supervisory capacity on premises posted as

provided in Section 576G may stop an; y person found on

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