—- cation Section which serves all members of the Branch. This Section prepares the Classification Guide prior to a test series and in the course of the series is available for interpretation of the guide, as well as for classification ef specific pieces of data. The Classification Officer occupies a dual pé@sition apasmuch as he is alse Classification Officer of the AEC Santa Fe Operations Office, The remaining Sections are primarily advisory. They do not have what are frequently called "operational functions". These Sections are concerned with industrial safety, radiological safety, and special assembly problems, 26 It is quite true that the Nevada Proving Grounds were originally thought of as an extension 6f the facilities of the Los Alamos Scientific Laboratory and it was therefore natural that the technical organization should be composed largely of LASL personnel, It is equally true that no Operation at the Nevada Proving Grounds has ever been carried out without participation by experimental units from the Defense Department and by civilian organizations outside éf the administrative jurisdiction of the AEC's Santa Fe Operations Office. Because of the fact that the Proving Grounds have never been reserved exclusively for use by LASL or even exclusively for laboratories under SFOO, the technical organization has always been an entity distinct from the parent organizations which have furnished its personnel, In practice every member of the Test Director's Branch including the Test Director is formally employed by a parent organization outside the administrative jurisdiction of the Las Vegas Field Office and in many cases outside the jurisdiction of the Atomic Energy Com- mission, So far as the technical aspects of a test series are concerned, how=- | éver, the Test Director is responsible directly rather than through his parent érganization to the sponsoring agencies or their delegated authorities. 3e In this description of the Test Director's Branch no mention has yet been made of the sources of technical information or its flow channels, The Test Direc~ ter's Branch includes a great number of competent scientists, specialists in all phases of research techniques and experienced in the special problems peculiar to nuclear explosions, The combined knowledge of all of these people is available t@ every Project Officer. Project Officers are encouraged t& make full use of this information. In many cases Préject Officers will know whom t6 see fer answers to specific technical questions, If this is not the case the Project Officer should bring his problems te the Test Director's Office. He will then be put in touch with those people best qualified to help him, he From time to time in the course of a test series formal and sometimes formidable documents are issued by the Test Director te cover specific points in detail, These documents run the gamut from general information sheets to the Administrative and Operatim Orders. The general purpose of all such dsécuments is to answer as many detailed questions in advance as can be anticipated,