ISQC 1.16 requires a firm to establish and maintain a system of quality control which includes policies and procedures addressing each of the following elements:

leadership responsibilities for quality within the firm;

relevant ethical requirements;

acceptance and continuance of client relationships and specific engagements;

human resources;

engagement performance;

monitoring.

A firm must have policies and procedures which ensure that its independence and objectivity cannot be jeopardised by the intervention of any partner or member of staff in the carrying out of an engagement. In addition, a firm has to have: