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thb District Control Committees, copies of such forms shall be sent
to the Trade Relations Committee, and shall be submitted by it to the
Administrator for his approval. Upon the Administrator's approval
thereof, no manufacturer in any district shall quote or sell lime or
lime products on terms or conditions at variance from those specified
in the forms approved for that district.
 Smc. 3. Methods of Selling.
 (a) Establishment of Basing Points.-The practice of determining
delivered prices for lime in given markets, by the utilization of a
basing point or points, plus the prevailing rail freight rates, has been
a long-standing custom in the Industry.
 Each District Control Committee (hereinafter in this Code pro-
vided for) may establish for its district a basing point or points
(and change or revise the same from time to time as conditions war-
rant), which basing point or points shall be fair and reasonable as
to all interested parties; provided, that in the event no such District-
Control Committee shall have been elected in any district within
twenty days after the effective date of this Code, then such basing
point or points shall be established for such district by the Trade
Relations Commitee acting upon the recommendations of the manu-
facturers therein.
 (b) Weighted Average District Costs.-Each District Control
Committee shall determine within its own district, and from time to
time revise and promulgate for the guidance of the Industry, the
weighted average cost of each industry product manufactured in
such district. Such cost shall be based upon the costs of individual
manufacturers, as provided for in Section I of this Article. In case
of a district having no District Control Committee the manufactur-
ers in such district shall report to the Trade Relations Committee,
or its designated agency, necessary data to enable the Trade Rela-
tions Committee to determine weighted average costs for each in-
dustry product manufactured in such district, and the Trade Rela-
tions Committee shall determine such costs and promulgate the same
for the guidance of the Industry. Such average costs shall be sub-
ect to the approval of the Administrator and the substantiating
ata shall be open to his inspection at all times. Such determination
of cost shall be made in such manner that individual figures are kept
confidential and shall not be available to competitors.
 After such average cost of each industry product is so determined
for any district, no manufacturer in the industry shall sell any such
industry product for delivery in such district at less than such aver-
age cost, plus basing rail freight. Any sale in any such district by
any manufacturer at less than such average cost, plus basing rail
freight, shall be an unfair method of competition.
 c) Prie Publication.-Each manufacturer in the industry shall,
within ten (10) days after the effective date of this Code, file with
the District Control Committees a list showing the basing point
prices, and terms and conditions of sale for each of the products
offered for sale in each district by such manufacturer and after the
expiration of such ten-day period, every manufacturer shall at all
times maintain on file with the District Control Committees a list
showing the basing point prices and terms and conditions of sale
except as herein provided. Each such list shall state the date upon