the statement on Form 3542 and must be determined by the publisher in the manner prescribed by § 16.5(c). The combined weight of one copy from each issue will also be obtained from the statement on Form 3542 and must be determined by the publisher in the manner prescribed by paragraph (d) of this section.

(d) How to determine combined weight during a calendar month. The combined weight of one copy from each issue mailed during a calendar month must include the wrapping and binding materials and must be obtained by the publisher as follows:

(1) Determine by the method prescribed in paragraph (b) of this section the average weight of one copy of any one issue selected by the postmaster for testing and verifying during the month.

(2) Divide the average weight of one copy by the number of sheets in the copy to determine the weight of one sheet in pounds. Record fractions of pounds as decimals with six digits to the right of the decimal point.

(3) Select one copy of each of the issues mailed during the month and count the sheets in all of the selected copies to determine the total number of sheets in the selected copies.

(4) Multiply the total number of sheets in the selected copies by the weight of one sheet.

(e) Verification by postmasters of weights and number of copies. The average weight per copy obtained by the publisher in the manner prescribed by paragraph (b) of this section for use either in computing postage on the bulk weight of a single issue or in determining the weight of one sheet as provided for by paragraph (d) of this section, must be verified by the postmaster by weighing, or by supervising the weighing of, a representative number of copies of the issue. If the average weight per copy is used for determining the weight of one sheet, the postmaster must also verify the computation by which the publisher determines the weight of one sheet. At the end of each calendar month, when postage is computed on the total bulk weight of all issues mailed during the month, the postmaster must verify the combined weight of one copy from each issue by counting the sheets in the copies filed under the provisions of § 16.5(a) and multiplying the total by the previously verified weight of one sheet furnished by the publisher on Form 3542

(Statement showing number of copies of second-class publication mailed). If there is reason at any time to doubt the accuracy of the number of copies reported on Form 3542, sufficient weighings must be made to resolve the doubt.

(f) Payment of postage at time of mailing or by advance deposits. Publishers must pay in money before mailings are dispatched all postage charged at the second-class rates shown in § 22.1 of this chapter. Exception: The transient rate (see § 22.1(c) of this chapter) must be paid by adhesive or meter stamps or by permit imprints. (See §§ 34.3(b) and 34.5(a) (2) of this chapter.) Postmaster will accept deposits of money to pay for as many mailings as desired and will give a receipt on Form 3544 (Post Office receipt for money) for the deposits.

(g) Record of mailings.

Postage on

the bulk mailings will be computed on Form 3541 from the weights obtained on Form 3542 (Statement showing number of copies of second-class publication mailed). The publisher will be furnished a duplicate of Form 3541 (Computation of second-class postage) if he requests one. When postage is computed on the bulk weight of one issue, the mailings and postage will be recorded on Form 3543 (Mailing record of second-class matter, postage and advance deposits). When postage is computed at the end of each calendar month on the total weight of all issues mailed during the month, the total mailings and postage for the month will be computed on one Form 3541, and only the totals will be recorded in Form 3543.

(h) How to show dates of issue and mailing. When a number of consecutive issues are covered by one Form 3541 or Form 3542, or by one entry on Form 3543, the dates of issue and the dates of mailing must be indicated by entering the first and last dates in the appropriate spaces and columns. § 16.7 Key rate.

mailed to each zone. During these 12month intervals, the publisher does not need to complete the lines for zones 1 to 8 on Form 3542. He enters only total zone mailings on "Total to all zones" line.

(c) New zone statement. Postmasters will require a new report on Form 3542 showing the mailings to each zone at any time during the 12-month intervals when the volume of mailings to the zones varies or when there is an increase in the total number of copies.

(d) Computation. (1) Compute the key rate on Form 3541 (Computation of second-class postage) once each calendar year at 12-month intervals. If a new report on Form 3542 (Statement

CITY

showing number of copies of secondclass publication mailed) is filed at any time during the 12-month intervals showing mailings to each zone, a new key rate must be computed and used.

(2) Enter on the corresponding lines in column B of Form 3541 the number of copies for each zone shown on Form 3542. Apply the applicable pound rates shown in column F to the number of copies for each zone and enter the postage for each zone in column C of Form 3541. Divide the total postage in item 2, column c, by the total number of copies in item 2, column B, to obtain the key rate, which should be carried to six decimal places. Apply the key rate only to the total weight of the advertising

Mayville

portion. Apply the regular reading portion rate to the total weight of the reading portion. Computation of the key rate must be verified by an employee or supervisor other than the person who originally computed it. See exhibit A, Computation of new key rate (Forms 3542 and 3541), following paragraph (d)(3) of this section.

(3) Prepare Form 3541 for subsequent

mailings as shown in exhibit B, Computation of postage based on mailings of one issue only (Forms 3542 and 3541), and exhibit C, Computation of postage based on mailings of all issues for calendar month (Forms 3542 and 3541), as shown below, until a new report on Form 3542 showing mailings to each zone is filed under paragraphs (b) and (c) of this section.

Les