In July 2020, the U.S. Consumer Product Safety Commission (CPSC or Commission) published a consumer product safety standard for gates and enclosures under section 104 of the Consumer Product Safety Improvement Act of 2008 (CPSIA). The Commission's mandatory standard incorporated by reference the American Society for Testing and Materials (ASTM) voluntary standard that was in effect for gates and enclosures at the time, with modifications to make the standard more stringent, to further reduce the risk of injury associated with gates and enclosures. The CPSIA sets forth a process for updating mandatory standards for durable infant or toddler products that are based on a voluntary standard, when a voluntary standards organization revises the standard. In June 2021, ASTM published a revised voluntary standard for gates and enclosures, and it notified the Commission of this revised standard in July 2021. This direct final rule updates the mandatory standard for gates and enclosures to incorporate by reference ASTM's 2021 version of the voluntary standard for gates and enclosures.