What are the responsibilities of the PCAOB, in relation to Accounting firms?

1. Register accounting firms that audit public companies 2. Establish audit, quality controls, ethics, independence, and other standards 3. Inspect firms 4. Conduct annual inspections of firms that audit more than 100 clients a year 5. Conduct inspections every 3 years on firms that audit fewer than 100 clients 6. Investigate and punishes wrongdoings