Exemption from disclosure preserves state, security, trade and privacy protections while allowing disclosure when public interest outweighs harm. Exemption provisions bar disclosure of information affecting national security, foreign relations, court forbidden publications, parliamentary privilege, commercial confidence, fiduciary and foreign government confidences, personal privacy, law enforcement sources, investigative processes, and cabinet deliberations, while allowing a public interest override permitting disclosure when the public interest outweighs harm and enabling release of suitably aged occurrences subject to governmental determination of the relevant period.