28 ARTICLE 1A.

down by the commission. To carry out the provisions of this Act the
State Aviation Commission and any officers, state or municipal, charged
with the duty of enforcing this Act, may inspect and examine at reason-
able hours any premises, and the buildings and other structures thereon,
where such airports, landing fields, air school, flying clubs, air beacons,

or other air navigation facilities are operated. Any order made by this
Commission pursuant to this act shall be served upon the interested per-
son by registered mail or in person before such order shall become effective.

1935. ch. 31t5, sec. 15C.

15C. The Commission or any Commissioner, or officer of the Com-
mission designated by the Commission, shall have the power to hold in-
vestigations, inquiries and hearings concerning matters covered by the
provisions of this Act, and all accidents in aeronautics within this State.
All hearings conducted by the Commission shall be open to the public.
Each Commissioner, and every officer of the Commission designated by it
to hold any inquiry, investigation or hearing, shall have the power to
administer oaths and affirmations, certify to all official acts, issue sub-
poenas, compel the attendance and testimony of witnesses, and the pro-
duction of papers, books and documents.

If a person fail to comply with any subpoena or other issue under the
authority of this Act, or if a person in attendance before the Commission
or a Commissioner refuse, without reasonable cause, to be examined or
to answer a legal and pertinent question, or to product¹ a book or paper
when ordered to do so by the Commission, the Commission or such Com-
missioner may apply to any Judge of the Supreme Bench of Baltimore
City, or of the Circuit Court of any County, upon proof by affidavit of
the fact, for a rule or order returnable in not less than two or more than
five days, directing such person to show cause before the Judge who made
the order, or any other Judge aforesaid, why he should not be committed
to jail; upon the return of such order, the Judge before whom the matter
and such person shall come on for a hearing shall examine under oath
such person and such person shall be given an opportunity to be heard;
and if the Judge shall determine that such person has refused, without
reasonable cause or legal excuse to appear before the Commission to
be examined or to answer a legal or pertinent question, or to produce
a book or paper which he was ordered to bring or product, ¹ he may forth-

with commit the offender to jail, there to remain until he submits to do the
act which he was so required to do, or is discharged according to law.

No person shall be excused from testifying or from produring¹ any
books or papers or documents in any investigation or inquiry by or upon
any hearing before the Commission or any Commissioner, when ordered
to do so by the Commission or such Commissioner upon the ground that
the testimony or evidence, books, papers or documents required of him
may tend to incriminate him or subject him to penalty or forfeiture: but

1 Evidently a typographical error.