The purpose of Section 11 of the National Security Act, 1980 is to-

Section 11 NSA, 1980 lays down the Advisory Board's procedure: it considers the material, may call for information, may hear the detainee, and reports within seven weeks whether there is sufficient cause, with its proceedings kept confidential except the opinion. Execution of orders is section 4 and communication of grounds section 8, and the review is not a public trial.