The PCAOB also adopted a new standard in 2017 to enhance the usefulness of the standard auditor's report by providing additional and important information to investors, such as the critical audit matters (CAMs) that auditors communicate to the audit committees of the public companies they are auditing. These are matters that are related to accounts or disclosures that are material to the financial statements, and involved especially challenging, subjective, or complex auditor judgment. The CAMs requirement goes into effect in 2019 and 2020. Beginning in 2017, the updated auditor's report also includes the tenure of the auditor with that company.