(1) Parcels weighing less than 10 pounds, and measuring over 84 inches but not exceeding 100 inches in length and girth combined, are chargeable with a minimum rate equal to that for a 10 pound parcel for the zone to which addressed. See § 135.3 for size and weight restrictions.

(2) For catalogs weighing up to 10 pounds, see paragraph (b) of this section.

(3) For books and library books, see paragraph (c) and (d) of this section.

(4) For 16-millimeter films, 16millimeter film catalogs and related materials, see paragraphs (c) and (d) of this section.

(5) Gold mailed within Alaska or from Alaska to other States and U.S. possessions: 2 cents each ounce or fraction, regardless of distance.

(b) Catalogs and similar printed advertising matter in bound form having

24 or more pages, at least 22 of which are printed, weighing 16 ounces or more but not exceeding 10 pounds-effective Nov. 14, 1970-(1) Rates for bulk mailings of separately addressed identical pieces in quantities of not less than 300 mailed at one time.

(i) Postage. Postage must be paid by permit imprints. Each imprint must show name of the post office, permit number, and the words "U.S. Postage Paid," unless the mailer is authorized to use a company permit imprint as provided in § 145.3 (c). The words "Bulk Catalog Rate” shall be printed within the permit imprint. The position of the imprint may be varied to that automatic data processing equipment may be utilized to simultaneously print the address, imprint and any other information.

(g) Sum of postage at the per piece rate and at the pound rate.

(h) Name and address of mailer and permit number.

(iii) Separation required. The mailer must separate mailing pieces by parcel post zones so that postage may be verified. Mail for each parcel post zone must be further separated and placed in sacks by cities or States of destination in each instance where there are 10 or more pieces for the same post office or State, or where five or more catalogs weigh 10 or more pounds. Use No. 3 mail sacks except when greater volume requires the use of No. 2 mail sacks. When there is insufficient volume for a direct sack or a State sack, combine the pieces in sacks for mixed States by parcel post zones. Label each sack to include parcel post zone separation and destination.

(iv) Separations recommended. In addition to the separations required in subdivision (iii) of this subparagraph, it is recommended that the mailer separate the pieces to the finest extent possible in the manner prescribed by § 134.4 (c) of this chapter.

(v) Maximum weight in a sack. The total weight of pieces placed in one sack must not exceed 70 pounds.

(2) Optional handling of bulk mailings of catalogs weighing in excess of 2 pounds when addressed for delivery in local parcel post zone only. Address labels and unaddressed catalogs weighing in excess of 2 pounds, at the option of the mailer, may be mailed separately for local delivery at the office of mailing subject to all of the following conditions:

(i) The address labels, which may not measure less than 3 by 44 inches, must show the full name and ZIP Code address of the sender and addressed and must be sorted by the mailer to the fourth and fifth digit of the ZIP Code.

(ii) Postage must be paid by permit imprints for each label, including labels returned as undeliverable. The imprint may be placed on the catalog or on the label. See § 145.1(a) of this chapter. The imprints must be prepared in the manner prescribed in subparagraph (1)(i) of this paragraph.

(iii) The mailer must submit with each mailing a statement on Form 3605 showing:

(a) The weight of a single piece.

(b) Total number of pieces in the mailing.

(c) Total number of pounds in the mailing.

(d) Total per piece charge.

(e) Total pound rate postage.

(f) Sum of postage at the per piece rate and at the pound rate.

(g) Name and address of mailer and permit number.

(iv) The total weight of pieces placed in sacks, cartons, crates or any other types of containers must not exceed 70 pounds.

(v) The address labels must be sent to the postmaster at the mailing (delivery) office by the mailer.

(vi) Address labels bearing incorrect, nonexistent or any other undeliverable addresses will be corrected or endorsed to show why they are undeliverable and returned under cover to the mailer. Each envelope shall be rated with postage due at the rate of 10 cents for each address label contained in the envelope. At the request of the mailer, the postmaster will notify the mailer, at mailer's expense and by means specified by mailer, of the number of address labels being returned. The request for notification must accompany the labels. Correctly addressed

labels will be held awaiting arrival of
the catalogs.

(vii) Catalogs will be deposited at the
acceptance point designated by the post-
master. If the number of catalogs de-
posited is not enough or too many to
match the number of address labels, the
postmaster will notify the sender, or his
designated representative or agent, of
the number of catalogs required to com-
plete the delivery or the number in ex-
cess. If the additional catalogs are not
delivered to the post office within 15
days, the excess address labels will be

returned under cover to the mailer. As
soon as deliveries are completed, the
postmaster will notify the sender or his
representative of the number of any ex-
cess catalogs on hand. Excess catalogs
may be called for by the mailer without
charge. Any excess catalogs not called
for within 15 days will be returned to
sender postage due at the single piece
catalog rate.

(3) Single piece rates for individual
mailings of catalogs (catalogs mailed at
these rates must be marked catalogs)
not mailed at bulk catalog rates in § 135.1
(b) (1) effective November 14, 1970:

mailable live animals, and all other mat-
ter not included in first-, second-, or
third-class.

(2) Zone rates in § 135.1(a) are ap-
plicable to all fourth-class mail, except
that items described in § 135.1 (b), (c),
and (d) may be mailed at the special
rates shown in those sections, if desired.

(3) Catalogs and similar printed ad-
vertising matter in bound form, having
24 or more pages, at least 22 of which
are printed, weighing 16 ounces or more
but not exceeding 10 pounds, may be ac-
cepted at the zone rates in § 135.1 (b) (1)
and (2).

(4) Only the following specifically de-
scribed articles may be mailed at the spe-
cial fourth-class rate provided by § 135.1
(c).

(i) Books, including books issued to
supplement other books, of 24 pages or
more, at least 22 of which are printed,
consisting wholly of reading matter or
scholarly bibliography or reading matter
with incidental blank spaces for nota-
tions and containing no advertising mat-
ter other than incidental announcements
of books. Advertising includes paid ad-
vertising and publishers' own advertis-
ing. Advertising may be in display, classi-
fied, or editorial style. The identification
statement "Special Fourth-Class Rate-
Books" must be placed conspicuously on
the address side of each package.

(ii) 16-millimeter films or narrower
width films which must be positive prints
in final form for viewing, and catalogs of
such films of 24 pages or more, at least
22 of which are printed, except films and
film catalogs sent to or from commercial
theaters. The identification statement
"Special Fourth-Class Rate-16 mm. or
Narrower Films or 16 mm. or Narrower
Film Catalog" must be placed conspicu-
ously on the address side of each package.

(iii) Printed music whether in bound
form or in sheet form. The identification
statement "Special Fourth-Class Rate-
Printed Music" must be placed con-
spicuously on the address side of each
package.

(iv) Printed objective test materials
and accessories thereto used by or in
behalf of educational institutions for
testing ability, aptitude, achievement, in-
terests, and other mental and personal
qualities with or without answers, test
scores, or identifying information re-
corded thereon in writing or by mark.
The identification statement "Special

Fourth-Class Rate-Objective Test Ma-
terials" must be placed conspicuously on
the address side of each package.

(v) Sound recordings, including inci-
dental announcements of recordings and
guides or scripts prepared solely for use
with such recordings. Player piano rolls
are classified as sound recordings. Mis-
cellaneous advertisements, including
trademarks, of persons or concerns other
than the record manufacturer, are not
permissible on title labels, protective
sleeves, jackets, cartons, and wrappers,
and such advertisements may not be
mailed as enclosures. The identification
statement "Special Fourth-Class Rate—
Sound Recordings" must be placed con-
spicuously on the address side of each
package.

(vi) Playscripts and manuscripts for
books, periodicals, and music. The iden-
tification statement "Special Fourth-
Class Rate-Manuscript" must be
placed conspicuously on the address side
of each package.

(vii) Printed educational reference
charts, permanently processed for pres-
ervation. The identification statement
"Special Fourth-Class Rate Education-
al Reference Charts" must be placed con-
spicuously on the address side of each
package.

(viii) Looseleaf pages, and binders
therefor, consisting of medical informa-
tion for distribution to doctors, hospitals,
medical schools, and medical students.
The identification statement "Special
Fourth-Class Rate-Medical Informa-
tion" must be placed conspicuously on
the address side of each package.

NOTE: When two or more articles described
in this section are mailed in the same pack-
age, the appropriate descriptive terms shall
be combined in the identification statement
placed on the address side. Example: "Special
Fourth-Class Rate-Books and Sound Re-
cordings."

(5) Only the articles specifically de-
'scribed in this section may be mailed at
the fourth-class library rate provided
by § 135.1(d). The identification state-
ment "Library Rate" must be placed con-
spicuously on the address side of each
package. Each package must show in the
address or return address the name of
a school, college, university, public li-
brary, or name of a nonprofit religious,
educational, scientific, philanthropic, ag-

ricultural, labor, veterans, or fraternal organization or association. No permit is required.

(i) The following specific items when loaned or exchanged between schools, colleges, or universities, and public libraries, museums, and herbaria, nonprofit religious, educational, scientific, philanthropic, agricultural, labor, veterans, or fraternal organizations or associations; or when cooperatively processed by libraries; or loaned or exchanged between libraries, organizations, or associations, and their members, readers, or borrowers, may be mailed at the library rate:

(a) Books, consisting wholly of reading matter, scholarly bibliography, or reading matter with incidental blank spaces for notations and containing no advertising other than incidental announcements of books.

(b) Printed music, whether in bound form or in sheet form.

(c) Bound volumes of academic theses in typewritten or duplicated form.

(d) Periodicals, whether bound or unbound.

(e) Sound recordings. (See also subparagraph (5) (ii) (b).)

(f) Other library materials in printed, duplicated, or photographic form or in the form of unpublished manuscripts.

(g) Museum materials, specimens, collections, teaching aids, printed matter, and interpretative materials intended to inform and to further the educational work and interests of museums and herbaria.

(ii) The following specific items when sent to or from schools, colleges, universities, public libraries, museums, and herbaria and to or from nonprofit religious, educational, scientific, philanthropic, agricultural, labor, veterans, or fraternal organizations or associations, may be mailed at the library rate:

(a) 16-millimeter or narrower width films; filmstrips; transparencies; slides; microfilms; all of which must be positive prints in final form for viewing.

(b) Sound recordings.

(c) Museum materials, specimens, collections, teaching aids, printed matter, and interpretative materials intended to inform and to further the educational work and interests of museums and herbaria.

(d) Scientific or mathematical kits, instruments, or other devices.

(e) Catalogs of the materials in paragraphs (5) (ii) (a), (b), (c), and (d) having 24 or more pages, at least 22 of which are printed, and guides or scripts prepared solely for use with such materials.

(6) The address and each piece mailed at the rates provided by § 135.1 (c) and (d) must include the complete ZIP Code. When 5,000 or more identical pieces are mailed at these rates during a single day and there are enough pieces for the same destination to fill approximately onethird of a sack, they must be presorted and placed in sacks under the instructions contained in § 134.4 (c) of this chapter as follows: Subparagraph (2); and subdivisions (i)(b), (ii) (b), (iii) (b), (iv) (b), and (v) (b) of subparagraph (6). When 1,000 or more but less than 5,000 identical pieces are mailed at these rates during a single day and there are enough pieces for the same destination to fill approximately one-third of a sack, they must be presorted and placed in sacks under the instructions in § 134.4(c) of this chapter as follows: Subparagraph (2); and subdivisions (ii) (b), (iii) (b), (iv) (d), and (v) (b) of subparagraph (6).

(b) Application of rates. (1) The rates in § 135.1 (a) and (b) are applied on the basis of weight of the individual piece and the zone between the sectional center facilities of the post offices of mailing and delivery. Articles addressed to military post offices overseas (Army, Air Force, Fleet post offices, and Naval vessels) require postage at the zone rate applicable between mailing office and post office shown in the address.

(2) There is a local zone which is defined by the Postmaster General from time to time and eight numbered zones which are determined as follows:

(i) The United States and its territories and possessions are divided into units of area 30 minutes square, identical with a quarter of the area formed by the intersecting parallels of latitude and meridians of longitude. Each unit of area is designated by a number.

(ii) The zones are based on a straight line distance between the unit of area in which the dispatching sectional center of the mailing post office is located and the unit of area in which the receiving sectional center facility of the post office of address is located, measured from the center of one unit to the nearest point in the other.