The thing to realize about the labeling is far more than just attaching a label. Let's face it, most of us cut labels off things anyway, the gov at this point can't make you keep a label on something that you have purchased and now own, especially garments etc. But some may actually keep those labels to refer to.And yes I have no idea how you are going to label a bow or hairclip.
The record keeping that goes with the batch# and the rest is for you the manufacturer to be able to keep complete records of every supply that you used in that item. Like I make a OOAK dress, I use 10 fabrics, 3 colors of thread, 2 trims, 1 style of button. When I assign that number, I have to keep track and be able to identify everyone of the products that went in to that garment. And if there is a problem anywhere down the food chain, I have to be able to identify the person who bought that dress with the purple button, that la mode recalled and contact them. That is my understanding of the nightmare of this law, over and above how to actually label the item.