The SSI Regulation limits the release of ISS to persons with “knowledge” (see 49 CFR no. 1520.11), who are generally defined as those who need the information necessary to carry out their work in the field of road safety. B, for example, DHS and TSA officials, airport managers, aircrew, railways, shippers and recipients of dangerous goods, owners and operators of ships and seaports and others, as in 49 CFR No. 1520. Less than a year after the bombing of Pan Am 103 over Lockerbie, Scotland, the President`s Commission for Aviation Safety and Terrorism recommended improvements in FAA safety bulletins, leading to the development of safety guidelines and bulletins. In 1990, Section 9121 of the Aviation Safety and Capacity Expansion Act of 1990 (Pub. L. 101-508) 14 CFR Part 191 to prohibit the disclosure of “any information obtained during security or research and development activities.” The Aviation Security Improvement Act of 1990 (Pub. L.

101-604) called for a minimum number of people with access to threat information that is often included in security guidelines (SDs) and newsletters (ICs). On March 21, 1997, the FAA revised 14 CFR Part 191 and changed its title to “Protection of Sensitive Security Information.” In addition, the current rule on the protection of the ISS from unauthorized disclosures has been strengthened, its application has been extended to air carriers, airport operators, indirect air carriers, foreign air carriers and individuals, and protected information, including inspection, incident and enforcement ISS, has been clarified. It should be remembered, however, that sensitive security information is regulated by published rules. If a document is duly identified as ISS, a staff member is clearly advised that they will comply with regulatory requirements and implementation guidelines for disclosure. The absence of a central office of the political program for ISS has created confusion and unnecessary classification of some materials as isS. Compliance with handling requirements within the TSA was inconsistent and there have been instances where SSI has been mishandling outside the TSA.