OK, I am just getting around to researching this (shame on me), but I still have yet to find anything specifically saying that childrens apparel needing to be tested. I found this...wouldn't clothing be about the same thing as blankets/bedding? Not durable...cloth/textile.
FAQs For Section 104: Standards and Consumer Registration of Durable Nursery Products
Will infants’ crib bedding, blankets, bath textiles, and apparel fall under the heading of “durable product”?
No. Congress did not define the term “durable,” but it is commonly understood to mean able to exist for a long time without significant deterioration. Cloth/textile items are generally not considered to be durable goods. None of the items Congress specified in section 104 as examples of durable products are items made entirely of cloth, rather they are primarily made from rigid materials (e.g., cribs, toddler beds, high chairs, strollers, bath seats).