If the graders disagree, their differences are referred to the board of coffee arbitrators, consisting of ten experts appointed by the board of managers. The superintendent selects by lot three of these arbitrators, who decide on the basis of the samples submitted, but will not make a decision lowering the grade below that of the lowest submitted nor higher than the highest. If the disputants do not change the grading to come within the arbitrators' findings, the samples are sent to the entire board of arbitrators, exclusive of those who may have been the original graders, and final decision is made by majority vote. As soon as the coffee is graded, a certificate is issued stating the grades, and bearing the signatures of the superintendent and graders. This certificate is conclusive evidence of the grade as far as the parties involved are concerned, for the subsequent twelve months. The buyer receives the original, and the seller a duplicate.

The rules provide that weights decided upon at the initial delivery are good during the life of the grading certificate for re-delivery, with definite allowances to the receiver, on re-delivery, of a quarter of a pound a bag a month, instead of having to re-weigh and re-sample for every separate delivery, as formerly.

As claims and trade controversies occasionally arise, the Exchange has provided means for their peaceful settlement. The board of managers elects annually an arbitration committee of five members, who swear to decide disputes fairly. This is the only committee on the Exchange that has power to adjudicate disputes between members and non-members; and its services must be sought by the disputants, who must agree to abide by its decision. An adjudication committee of seven is annually chosen from the membership by the managers, to adjust all claims and controversies between members arising out of any merchandise transaction, "if notice in writing of such claim or controversy, and of the intention to demand an adjudication thereon, be served by either party thereto within ten days from the ascertainment thereof."

Within three days of the serving of this notice, each disputant selects an Exchange member as his adjudicator; and these two name the third, who must be a member of the adjudicating committee. Even this decision may be appealed to the board of managers, which, if it finds the grounds of appeal good (as decided by majority vote), appoints an appeal committee of five, of whom three must be members of the board. This last committee's decision is final. No new testimony bearing on the case may be introduced after the case has been closed by the adjudicators. Arbitration is voluntary with both parties; while adjudication is compulsory upon the application of either.

Another committee of trade importance is the spot quotation committee of five Exchange members. Each day at two o'clock, except on Saturday, when it meets at 11:45, this committee by a majority vote establishes the official daily market quotation of No. 7 coffee. There is likewise a committee on quotations of futures. This committee of five meets daily "immediately after the first call and at the close of the Exchange and reports to the superintendent the tone and price of the contract market, to be posted on the blackboard and transmitted to other Exchanges and commercial bodies."

A committee of five on trade and statistics has the important function of reporting to the board as to regulations for the "purchase, sale, transportation and custody of merchandise," and it attempts to establish uniformity in such matters between different markets. It has charge also of "all matters pertaining to the supply of newspapers, market reports, telegraphic and statistical information for the use of the Exchange. In the early 80's the Exchange abolished the old method of keeping coffee statistics, and the basis then adopted has since been accepted by all the large coffee markets of the world."

The minimum rates of commission on coffee "per contract of 250 bags, for members of the Exchange residing in the United States, are based upon a price" as follows, quoting from the Exchange bylaws adopted June 8, 1920:

Coffee Exchange Commission Rates
(Per contract of 250 bags)
Commission
for buying
or selling
Floor
brokerage
for buying
or selling
Below 10 cents$6.25$1.50
10 cents up to 19.99 cents7.501.75
20 cents and above10.002.00

For non-members residing within the United States, double the above rates of commission shall be charged.

For members and non-members residing outside of the United States a commission of $2.50 shall be charged in addition to the above rates.