In September 2017, the U.S. Consumer Product Safety Commission (CPSC) published a consumer product safety standard for infant bouncer seats under section 104 of the Consumer Product Safety Improvement Act of 2008 (CPSIA). The standard incorporated by reference the ASTM voluntary standard that was in effect for infant bouncer seats at the time, with modified requirements for warning labels. ASTM has since revised the voluntary standard for infant bouncer seats. The CPSIA provides a process for when a voluntary standards organization updates a standard that the Commission incorporated by reference in a section 104 rule. Consistent with that process, this direct final rule revises the mandatory standard for infant bouncer seats to incorporate by reference the updated version of the ASTM standard.