MILK CONTROL. 847

authorized or required to conduct, the Commission or any member thereof,
and its executive secretary shall have power to administer oaths, take
depositions, issue subpoenas, compel the attendance of witnesses and the
production of books, accounts, papers, records, documents and testimony.
In case of failure of any person to comply with the order of the Com-
mission or a subpoena issued by the Commission or any of its members,
or its executive secretary, or on the refusal of a witness to testify to any
matter regarding which he may be lawfully interrogated, the judge of
the Circuit Court of Baltimore City, if the person resides in Baltimore
City, or the judge of the Circuit Court for the County in which the person
resides, on application of any member of the Commission, or its executive
secretary, shall compel obedience by attachment proceedings as for con-
tempt, as in the case of disobedience of the requirements of a subpoena
issued from such court or a refusal to testify therein. Each officer who
serves such subpoena shall receive the same fees as a sheriff, and each
witness who appears, in obedience to a subpoena, before the Commission,
or a member, or its executive secretary, shall receive for his attendance
the fees and mileage provided for witnesses in civil cases in circuit courts,
which shall be audited and paid in the same manner as other expenses
are audited and paid, upon the presentation of proper vouchers, approved
by two members of the Commission. No witness subpoenaed -at the
instance of a party other than the Commission, or one of its members, or
its executive secretary, shall be entitled to compensation unless the Com-
mission shall certify that his testimony was material to the matter
investigated.

(c) To have access to and at all reasonable hours enter any place where
milk is being produced, transported, processed, stored, bottled or sold.
Such power may be exercised by any member of the Commission, or any
employee designated for the purpose; and any such member or designated
employee shall also have power upon order of the Commission to inspect
all books, papers, records or documents at any place within the State,
for the purpose of ascertaining facts to enable the Commission to ad-
minister this Article; and in connection therewith to compel producers
and milk dealers to adopt a uniform system of record in order to enable
the Commission to secure the necessary information.

(d) To act as mediator and arbitrator in any controversy or issue
that may arise among or between producers and dealers, or any other
group in this Article defined, participating in the milk industry.

(e) To determine and designate any area of the State as a natural
marketing area, whenever such determination and designation may be
requested, as provided in this Section, to establish definite boundaries
between markets in order to secure uniformity, enforce the provisions and
effect the purposes of this Article.

(f) To appoint one or more advisory boards representing all phases of
the industry affected, including producers and distributors, to assist the
Commission in the performance of its duties. In case any such advisory
board shall consist of both producers and distributors the representation