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may request, through such confidential agency or agencies as he may
designate. All information so collected shall be kept strictly confi-
dential except as the same is reported to the Administrator and ex-
cept as may be disclosed by the Administrator for the purpose of
enforcing the provisions of the National Industrial Recovery Act.
 (e) In order to facilitate the application and operation of the
provisions of this Code, the Trade Relations Committee may issue
interpretations thereof, subject to an appeal to the Administrator
in the manner hereinafter provided.
 (f) The Trade Relations Committee may from time to time ap-
point such subcommittee or designate such agencies, and may dele-
gate to any of them such of its powers and duties, as it shall deem
necessary or proper.
 SEC. 3. Lime Industry Districts.-The Industry shall be divided
into "Lime Industry Districts which districts initially established
are set forth in Schedule A to this Code. The Trade Relations Com-
mittee may from time to time revise such districts or any of them,
subject to the approval of the manufacturers within the district or
districts affected, and subject to the approval of the Administrator.
 The manufacturers in each district may, at a meeting called for
that purpose on notice to all manufacturers in such district, at which
meeting each manufacturer shall be entitled to one vote, establish
therefore, upon the majority vote of the manufacturers in attendance
at such meeting, a District Control Committee to consist of such
number of members as such manufacturers shall determine. In order
to provide, as far as practicable, and as not otherwise required by
this Code, for the administration of this Code within each district
by the manufacturers therein, the District Control Committee, in
addition to the duties and powers elsewhere in this Code conferred
upon them, shall be charged with the power and duty of supervising
and enforcing the provisions of this Code within their respective
districts and may make such investigations as may be necessary for
that purpose.
 All information necessary for any such investigation shall be
reported to a confidential agency selected by the District Control
Committee and shall be kept confidential except when a violation of
this Code is thereby disclosed.
 Each District Control Committee may consider and prepare uni-
form merchandising plans to be recommended to the Trade Relations
Committee containing such provisions as may be deemed necessary
or proper to insure fair selling methods by the manufacturers in the
district and to prevent unfair competitive practices, and to consider
and prepare for recommendation to the Trade Relations Committee
any system of standardization of products necessary or advisable
to insure fair selling methods, and to advise with the Trade Rela-
tions Committee upon any other matter pertinent to the purposes or
administration of this Code.
 SEC. 4. Amendments.-Such of the provisions of this Code as are
not required to be included therein by the National Industrial Re-
covery Act may, with the approval of the President, be modified or
eliminated as changes in the circumstances or experience may indi-
cate. It is contemplated that from time to time supplementary
provisions to this Code or additional Codes will be submitted for