NELM). Fleet Post Office, New York, is subject to limitations applicable to Navy No. 100.

1 Parcels may not contain: a. Medicines and vaccines not conforming to French laws; b. nonauthorized publications, reprints, and publications prohibited on account of their political character or immoral contents; c. currency, gold and silver bullion; d. securities.

Parcels may not contain securities, precious metals,

or currency.

Customs declaration tags are not required for parcels which: a. Contain official matter from Government agencies and are addressed to a military organization or to military personnel; b. contain materials or supplies sent by contractors for Government use and bear the endorsement Contents for Official Use-Exempt from Customs Requirements.

Articles will be liable for customs duty and/or pur chase tax unless they are bona fide gifts, personal effects, or items for personal use intended for military personnel or their dependents. Where the contents of a parcel meet these requirements, the mailer should place a certification similar to the following on the customs form under the heading-Description of Contents: Certified to be a bona fide gift, personal effects, or items for personal use of military personnel and dependents thereof. The following articles may not be accepted: a. Securities; b precious metals; c. currency.

Parcels except those sent as registered mail may not exceed 42 inches in length or 72 inches in length and girth combined.

Parcels may not contain firearms of any type. 'Parcels may not contain currency, foreign or do mestic, except when sent in official shipments.

This prohibition does not apply to gift shipments o cigarettes, tobacco, and tobacco products donated by tobacco companies to hospitalized military personnel when addressed to the commanding officer of a military hospital, nor to parcels addressed to Exchange or Spe. cial Services Offices at APO's when endorsed "For Milltary Agency."

Air parcels may not exceed dimensions shown in footnote 11.

10 Mailable firearms may be shipped only by unregistered air parcel post. (See § 15.5 of this chapter concerning concealable firearms.) All other parcels may not contain firearms of any type.

" Parcels may not exceed the following dimensions:

Length

42 inches....

Not over

72 inches length and girth combined.

24 inches girth.

20 inches girth.

16 inches girth.

12 Parcels, other than official shipments, are limited to 20 pounds in weight and 50 inches in length and girth combined.

13 Registered, certified, or numbered insured mail will not be sent to box addresses of this APO.

14 Parcel post packages will not be sent to personnel at the Dependent Mail Section of this APO.

(R.S. 161, as amended, 5 U.S.C. 22, 39 U.S.C. 501, 505, 706, 712) 1961, as amended at 26 F.R. 11903, Dec. 13, [26 F.R. 11535, Dec. 6, 1961]

The postal delivery zone system expedites and simplifies the handling of mail in the following ways:

(a) Incoming mail. The distribution of mail is performed more rapidly by the use of simple numbers in addition to street name, block, and house numbers. (b) Outgoing mail. The primary separation can be made at originating post offices of mail for delivery at other major post offices.

(c) Distribution scheme knowledge. The need for detailed scheme knowledge on the part of primary distribution employees is reduced.

As a re

(d) Improved addressing. finement of the address, the zone number facilitates the prompt routing of mail for duplicate named or numbered streets.

(e) Premailing separation. By advanced separation to individual delivery zones, or delivery points, mailers of bulk or quantity mailings can realize the advantages of reduced handling and prompt delivery.

§ 18.2 Maintenance of zone system.

(a) Subdivision of total delivery area— (1) Geographic. A delivery zone may be a definite geographic section of the total delivery area, encompassed entirely within a delivery station or served by a secondary distribution unit.

(2) Other. A delivery zone may represent a series of post office box numbers, military installations, government agencies, or the official establishments of the Postal Service.

(1) The

(b) Boundaries of zones. boundaries of geographic zones must be as permanent as the present and forseeable needs of the postal population permit.

(2) Zone boundaries should coincide with delivery station boundaries or conform to natural physical boundaries.

(3) A zone should not be served by more than one delivery or secondary distributing unit. Two or more entire zones may be included in the area served by one delivery or secondary distributing unit.

(4) All city delivery carrier routes in a zone should emanate from the same delivery unit.

(5) A zone should not be extended or assigned to a new area that will eventually consist of more than approximately 40 city delivery carrier routes. Areas of