A. The working papers may be obtained by third parties when they appear to be relevant to issues raised in litigation
B. The safe custody of working papers is the responsibility of client, if kept at his premises
C. The working papers must be retained by an audit firm for a period of 10 years
D. Successor auditors may have access to working papers of the predecessor auditors. The approval of client is not required.

A. They document the level of independence maintained by the auditor
B. They should be considered as the principle support for the auditor’s report
C. They should not contain details regarding weaknesses in the internal control system
D. They help the auditor to monitor the effectiveness of the audit firm’s quality control