MILK CONTROL. 859

wise, required of him may tend to incriminate him or subject him to a
penalty or forfeiture. But no natural person shall be prosecuted or sub-
jected to any penalty or forfeiture for or on account of any transaction,
matter, or thing concerning which he may testify or produce evidence docu-
mentary or otherwise, before the Commission in obedience to a subpoena
issued by it. Provided, that no natural person so testifying shall be
exempt from prosecution and punishment for perjury committed in so-
testifying.

1935, ch. 310, sec. 18.

18. It is hereby declared to be the legislative intent that the instant,
whenever that may be, that the handling within the State by a milk dealer
of milk produced outside of the State becomes a subject of regulation by
the State in the exercise of its police powers, the restrictions set forth in
this Article respecting such milk so produced shall apply and the powers'
conferred by this Article on the commission shall attach. After any such
milk so produced shall have come to rest within the State, it shall be sub-
ject to the provisions of this Article and the lawful rules and regulations
of the Commission adopted pursuant thereto.

1935, ch. 310. sec. 19.

19. No provision of this Article shall apply or be presumed to apply to
foreign or interstate commerce, except insofar as the same may be per-
mitted by the Constitution of the United States, the acts of Congress and
treaties made thereunder. The Commission, however, is vested with power
to confer and cooperate with the legally constituted authorities of other
states the District of Columbia and the United States, including the Secre-
tary of Agriculture of the United States, in order to secure a uniform
system of milk control, and shall have power to conduct joint hearings and
issue joint or concurrent orders and to enter into compacts for the fore-
going purposes, and may exercise its powers under this Article to effect
such uniform milk control.

1935, ch. 310, sec. 20.

20. The licenses and permits and other requirements of this Article
shall be in addition to any other requirements, whether in the form of
permits or licenses or not, now or hereafter exacted from or imposed upon
milk producers or dealers, by health authorities, or such other public agen-
cies, by any provisions of law, and in addition to the requirements of what-
soever character exacted from or imposed upon milk dealers or producers
by the provisions of any charter or ordinance of any municipal corpora-
tion, or any sanitary or other regulations of any health authorities, per-
taining to the production, storage, handling, content or marketing of milk.
Nothing in this Article shall be so construed as to repeal or modify any
such law, ordinance, or regulation, or as in conflict with any such charter
provision unless herein excepted.