2 types of External Audits:

External Audits - 2 types

1) Statutory - This is when entities are required by law to have an audit
2) Non - Statutory - This is when there is no legal requirement. 

Types of Review engagements:

Review engagements - The auditor reviews the FS using less evidence than  in an audit

Risk assessment reports
Review of internal controls
Value for money reviews
Social and environmental reports