merce, Bureau of the Census, Foreign Trade Division, Washington, D.C., 20233, when in doubt as to the proper classification as equipment, parts and accessories, or scrap.

INTERPRETATION 11: [RESERVED] INTERPRETATION 12: SCRAP ARMS, AMMUNITION, AND IMPLEMENTS OF WAR

Arms, ammunition, and implements of war, as defined in the United States Munitions List (see § 370.5(a) of this chapter), are under the jurisdiction of the U.S. Department of State, with the following exceptions:

(1) Cartridge and shell cases which have been rendered useless beyond the possibility of restoration to their original identity by means of excessive heating, flame treatment, mangling, crushing, cutting, or by any other method are "scrap" and under the jurisdiction of the U.S. Department of Commerce.

(2) Cartridge and shell cases which have been sold by the armed services as "scrap" are under the jurisdiction of the U.S. Department of Commerce, whether or not they have been heated, flame-treated, mangled, crushed, cut, or reduced to scrap by any other method.

(3) Other commodities on the Munitions List are "scrap" and under the jurisdiction of the U.S. Department of Commerce if they have been rendered useless beyond the possibility of restoration to their original identity only by means of mangling, crushing, or cutting.

When in doubt as to whether a commodity covered by the Munitions List has been rendered useless, exporters should consult the Office of Munitions Control, U.S. Department of State, Washington, D.C., 20520, or the Office of Export Control, U.S. Department of Commerce, Washington, D.C., 20230, before reporting a shipment as metal scrap. INTERPRETATION 13: ELECTRON TUBES (EXPORT

CONTROL COMMODITY No. 72930)

The non-military versions (glass or metal) of types of electron tubes described or listed below are excepted from validated license requirements for shipments to Country Groups T and V. This exception from validated 11cense requirements for shipments to Country Groups T and V includes any of the listed non-military type tubes which may be prefixed by a symbol described below to identify the manufacturer, or suffixed by a symbol set forth below to indicate either a minor manufacturing modification of the original tube type or the type of glass envelope. Multiple branded tubes (those with more than one type number) are excepted when one of the type numbers is excepted.

Military versions of tubes are identified by the use of the letter "W" following any standard tube designation indicated below. For example, 6J5 and 5AW4 are on the ex

cepted list; however, 6J5W and 5AW4W are not on the excepted list since the letter "W" following the standard designation indicates that it is a military version.

A prefix which identifies the tube manufacturer is not part of the tube type number and therefore does not affect the coverage. Examples of such prefixes are: CK; EE; EL; F; GL; HK; HY; ML; NL; NU; PL; RK; TS; UE; WE; and WL.

The following suffixes indicate minor manufacturing modifications or type of glass envelope: G and GT indicate different types of glass envelopes, and A, B, C, Ne, L and Y indicate minor manufacturing modifications of the original tube type.

Any tube listed below which includes a prefix or suffix other than those described above will not be considered as excepted.

In addition to the types listed below, the following tubes are excepted from the valldated license requirements for shipments to Country Groups T and V: any single-ended glass envelope tube with a standard 7-pin miniature or a 9-pin noval base, and having a basic tube type number consisting of one or two digits followed by one or two letters followed by a single digit (for example, 184, 6C4, 12X4, 12AU7).

INTERPRETATION 14: ROTARY WELL DRILLING RIGS

A rotary well drilling rig (Export Control Commodity No. 73203 when truck mounted, and Export Control Commodity No. 71842 when not truck mounted) consists essentially of a derrick or mast, sub-structure and platform, draw-works, rotary-table, kelly, swivel, crown and travelling blocks, wire rope, and hose. Expendable items such as drill pipe casing, oil, grease, drilling mud, and explosives are not included in this interpretation.

Items such as the following, whether or not shipped with a drill rig, are subject to the export controls applicable under their individual Export Control Commodity numbers: rotary rock drill bits, internal combustion engines, generators, and slush pumps, Export Control Commodity Nos. 69524, 71150, 72210, and 71921, respectively. Parts and accessories, n.e.c., specially fabricated for rotary drill rigs, are subject to export controls applicable under Export Control Commodity No. 71842.

INTERPRETATION 15: OPTICAL CURVE
GENERATORS

An optical curve generator as specified on the Commodity Control List under Export Control Commodity No. 71951, is defined, for export control purposes, as a machine which produces aspherical curved surfaces or is capable of producing spherical and aspherical curved surfaces on blanks of optical glass or similar material by means of a grinding wheel moving over the surface of a blank in a path of generation governed by cams and linkages which may be preset to produce a predetermined curvature.

The coverage of the entry under Export Control Commodity No. 71951 for "Optical curve generators capable of producing aspherical curves without the use of mating surfaces" is specifically limited to machines using as a surface shaping medium a grinding wheel which has diamonds or other abrasive material impregnated in its cutting surface. Lens grinders, surfacers, and polishers which produce curved surfaces by utilizing loose abrasives are not included in the entry.

INTERPRETATION 16: METAL ROLLING MILLS

A rolling mill is defined, for export control purposes, as a rolling mill stand or line of stands and accessory equipment, beginning

with the approach table or uncoiler and ending with the runout table or recoiler which follows the final change in shape or dimension of the metal being processed. A rolling mill rolls ferrous or nonferrous metals (a) from cast ingots or slabs into semifabricated or finished rolled products or (b) from semi-finished products into such rolled products as structural shapes, miscellaneous shapes, plates, pipe skelp, sheet, strip, bars, rods, tubes, pipes, etc. It may be a reversing or non-reversing or a continuous or semi-continuous mill. It may be designed for either hot or cold rolling, for producing either welded or seamless tubes and pipes, or for such operations as temper rolling (skin pass) or simultaneous surface and side rolling (universal mill).

When a complete rolling mill is being exported, the export controls specified under Export Control Commodity No. 71522 are applicable to most but not all of the equipment required for the mill. In this category are included such items as roll stands, work rolls, back-up rolls, approach tables, runout tables, manipulators, edgers, up coilers, down coilers, tension and pay-off reels, cooling and quenching equipment. Electric motors and control devices (electric, electronic and/or hydraulic) are considered a part of the rolling mill only when included in the original installation of the mill. However, when sent as replacement parts they are subject to controls applicable to the specific item (for example, electric motors, motor controls, and industrial process controls, Export Control Commodity Nos. 72210, 72220, and 72952, respectively).

Auxiliary equipment which is used with a rolling mill but is not a part of the mill is subject to the controls applicable to the specific type of equipment, even though such equipment is exported with the mill. For example, electric generators are subject to controls specified under Export Control Commodity No. 72210; roll grinders, roll lathes, shears, and other machine tools are subject to controls specified under Export Control Commodity No. 71510; annealing furnaces are subject to controls specified under Export Control Commodity Nos. 71914 (nonelectric furnaces) or 72992 (electric furnaces); and other equipment for the further processing of the metal product after it has come from the rolling mill, such as tinplate lines, galvanizing lines, and electroplating lines are subject to controls under Export Control Commodity No. 71980.

Since the examples given in the above paragraphs are not all-inclusive, the exporter should, in addition to following the guide lines set forth above, carefully check both the Schedule B and the Commodity Control List before entering an Export Control Commodity number on an export license application or on a Shipper's Export Declaration for a particular item he plans to export for use in or with a rolling mill.

INTERPRETATION 17: [RESERVED]