(2) Prior to the assassination the Secret Service’s criteria dealt with direct threats against the President. Although the Secret Service treated the direct threats against the President adequately, it failed to recognize the necessity of identifying other potential sources of danger to his security. The Secret Service did not develop adequate and specific criteria defining those persons or groups who might present a danger to the President. In effect, the Secret Service largely relied upon other Federal or State agencies to supply the information necessary for it to fulfill its preventive responsibilities, although it did ask for information about direct threats to the President. (_c_) The Commission has concluded that there was insufficient liaison and coordination of information between the Secret Service and other Federal agencies necessarily concerned with Presidential protection. Although the FBI, in the normal exercise of its responsibility, had secured considerable information about Lee Harvey Oswald, it had no official responsibility, under the Secret Service criteria existing at the time of the President’s trip to Dallas, to refer to the Secret Service the information it had about Oswald. The Commission has concluded, however, that the FBI took an unduly restrictive view of its role in preventive intelligence work prior to the assassination. A more carefully coordinated treatment of the Oswald case by the FBI might well have resulted in bringing Oswald’s activities to the attention of the Secret Service. (_d_) The Commission has concluded that some of the advance preparations in Dallas made by the Secret Service, such as the detailed security measures taken at Love Field and the Trade Mart, were thorough and well executed. In other respects, however, the Commission has concluded that the advance preparations for the President’s trip were deficient. (1) Although the Secret Service is compelled to rely to a great extent on local law enforcement officials, its procedures at the time of the Dallas trip did not call for well-defined instructions as to the respective responsibilities of the police officials and others assisting in the protection of the President.