Would a sewing machine be required to sew on the threads for this skirt, or would it be OK to do by hand?

a href="http://www.asos.com/One-Teaspoon/One-Teaspoon-Thread-Salvage-Denim-Mini-Skirt/Prod/pgeproduct.aspx?iid=1094900&cid=2639&sh=0&pge=1&pgesize=200&sort=3&clr=Salvage+Blue" rel="nofollow"http://www.asos.com/One-Teaspoon/One-Tea…/a