Code of Federal Regulations Title 49. Transportation § 49.1542.303 Security Directives and Information Circulars

(a) TSA may issue an Information Circular to notify airport operators of security concerns. When TSA determines that additional security measures are necessary to respond to a threat assessment or to a specific threat against civil aviation, TSA issues a Security Directive setting forth mandatory measures.

(b) Each airport operator must comply with each Security Directive issued to the airport operator within the time prescribed in the Security Directive.

(c) Each airport operator that receives a Security Directive must—

(d) In the event that the airport operator is unable to implement the measures in the Security Directive, the airport operator must submit proposed alternative measures and the basis for submitting the alternative measures to TSA for approval. The airport operator must submit the proposed alternative measures within the time prescribed in the Security Directive. The airport operator must implement any alternative measures approved by TSA.

(e) Each airport operator that receives a Security Directive may comment on the Security Directive by submitting data, views, or arguments in writing to TSA. TSA may amend the Security Directive based on comments received. Submission of a comment does not delay the effective date of the Security Directive.

(f) Each airport operator that receives a Security Directive or an Information Circular and each person who receives information from a Security Directive or an Information Circular must: