(2) Zone rates in § 25.1(a) are appli-
cable to all fourth-class mail, except that
items described in § 25.1 (b), (c), and
(d) may be mailed at the special rates
shown in those paragraphs 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 § 25.1(b) (1)
and (2).

(4) Only the following specifically de-
scribed articles may be mailed at the
Special Fourth-Class Rate provided by
§ 25.1(c):

(i) Books of 24 pages or more, at least
22 of which are printed, permanently
bound for preservation consisting wholly
of reading matter or scholarly bibliog-
raphy or reading matter with incidental
blank spaces for notations and contain-
ing no advertising matter other than
incidental announcements of books.
Advertising includes paid advertising and
publishers' own advertising. Advertis-
ing may be in display, classified, or edi-
torial style. The identification state-
ment "Special Fourth-Class Rate-
Books" must be placed conspicuously on
the address side of each package.

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

(iii) Printed music whether in bound
form or in sheet form. The identifica-
tion statement "Special Fourth-Class
Rate Printed Music" must be placed
conspicuously 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,
interests, 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

33-61965-

guides or scripts prepared solely for use
with such recordings. Miscellaneous
advertisements, including trademarks,
of persons or concerns other than the
record manufacturer, are not permis-
sible on title labels, protective sleeves,
jackets, cartons, and wrappers, and such
advertisements may not be mailed as en-
closures. The identification statement
"Special Fourth-Class Rate-Sound Re-
cordings" must be placed conspicuously
on the address side of each package.

(vi) Manuscripts for books, periodical
articles, and music. The identification
statement "Special Fourth-Class Rate-
Manuscript" must be placed conspicu-
ously on the address side of each pack-
age.

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

(viii) Looseleaf pages, and binders
therefor, consisting of medical infor-
mation for distribution to doctors, hos-
pitals, medical schools, and medical
students. The identification statement
"Special Fourth-Class Rate Medical
Information" must be placed conspicu-
ously on the address side of each pack-
age.

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 Recordings."

(5) Only the articles specifically de-
scribed in this subparagraph may be
mailed at the fourth-class library rate
provided by § 25.1(d). The identifica-
tion statement "Library Rate" must be
placed conspicuously on the address side
of each package. Each package must
show in the address or the return ad-
dress the name of a school, college, uni-
versity, public library, or the name of a
non-profit religious, educational, scien-
tific, philanthropic, agricultural, 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 libra-
ries, nonprofit religious, educational,
scientific, philanthropic, agricultural,
labor, veterans, or fraternal organiza-
tions or associations; or when onera-

tively processed by libraries; or when sent on loan or exchange between those libraries, organizations, or associations, and their members, readers, or borrowers; may be mailed at the Library Rate:

(a) Books, consisting wholly of reading matter or scholarly bibliography or reading matter with incidental blank spaces for notations and containing no advertising matter 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 subdivision (ii) (b) of this subparagraph.)

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

(ii) The following specific items when sent to or from schools, colleges, universities, or public libraries, 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 films; filmstrips; transparencies; slides; microfilms; all of which must be positive prints in final form for viewing.

(b) Sound recordings.

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

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

CODIFICATION: Paragraph (a) was revised, 29 F.R. 8007, June 24, 1964. Subsequently, subparagraph (4) (v) was revised, 29 F.R. 16252, Dec. 4, 1964.

Prior Amendments 1963: 28 F.R. 1471, Feb. 15.

(b) Application of rates.

(2) There are eight parcel post zones determined as follows:

of such commodities.)

(b) Size. *

(3)

§ 25.5 Additions.

(b) Permissible.

(1) The following

written additions may be placed on the wrapper, on a tag or label attached to the outside of the parcel (see § 13.2(b) of this chapter for space requirements), inside the parcel, either attached to an article or loose:

or

(i) Marks, numbers, name, or letters descriptive of contents.

(ii) Please Do Not Open Until Christmas, Merry Christmas, Mom & Dad, Happy Birthday, Mother, With Best Wishes, John Doe, and similar inscriptions.

(iii) Instructions and directions for the use of an article in the package.

EXAMPLE: Directions for use of prescription medicine.

(iv) Manuscript dedication or inscription not in the nature of personal correspondence.

(v) Marks to call attention to any word or passage in text.

(vi) Corrections of errors in:

typographical

(a) Circulars or printed matter. Handwritten or typewritten changes or additions in the body of a circular are limited to corrections of actual typographical errors.

(b) Proof sheets. Corrections in proof sheets include corrections of typographical and other errors, alterations of text, insertion of new text, marginal instructions to the printer, and rewrites of part if necessary for correction. Corrections should be on margins or attached to the manuscript. Do not enclose manuscript of another article.

(vii) Handstamped imprints, except when the added matter is in itself personal or converts the original matter to a personal communication. In the latter case, however, the mailing at one time at the post office window or other depository designated by the postmaster of not less than 20 identical, unsealed copies will be sufficient evidence to establish that the imprint is impersonal.

(viii) Any printed matter mailable as third class.

(2) An invoice or similar document for descriptive purposes only, may be enclosed or placed in an envelope (marked "Invoice Enclosed" attached to the outside, showing any or all of the following: (i) Names and addresses of sender and addressee.

(ii) Names and quantities of articles enclosed.

(iii) Description of articles enclosed, including price, tax, style, stock number, size, and quality; and if defective, nature of defect.

(iv) Order or file number, date of order, date and manner of shipment, shipping weight, and postage paid.

(v) Initials or name of packer or checker.

CODIFICATION: In § 25.5 the section heading and paragraph (b) were revised, 27 F.R. 11766, Nov. 29, 1962. Subsequently, paragraphs (a) and (b)(1)(ii) were revised, 29 F.R. 8008, June 24, 1964.

Prior Amendments 1962: 27 F.R. 6498, July 10. § 25.6 Enclosures.

(a) Catalogs. Catalogs mailed at the rates in § 25.1(b) (1) and (2)(i) may have any or all of the following enclosures, provided the loose enclosures form only an incidental portion of contents: (1) Order forms, reply envelopes, and circulars.

(2) One each of a printed blotter, illustrated display sheet, poster, dealer's card, or similar printed advertising matter.

(3) An invoice. (Sec. § 25.5(b) (2).) (b) Special fourth-class and library rate.-(1) Books. The following may be enclosed with books:

(i) Reply envelope or post card, single order form, and a printed circular, relating exclusively to the book with which it is enclosed.