In December 2017, the U.S. Consumer Product Safety Commission (CPSC) issued a consumer product safety standard for children's folding chairs and stools. The standard incorporated by reference the applicable ASTM voluntary standard. The Consumer Product Safety Improvement Act (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. Since 2017, ASTM has revised the voluntary standard for children's folding chairs and stools twice. Consistent with the CPSIA update process, this direct final rule updates the mandatory standard for children's folding chairs and stools to incorporate by reference ASTM's 2021 version of the voluntary standard.