If you live in the tri-county area, it is the Notice Of Acceptance (NOA) issued by Miami-Dade County that will certify a product as impact resistant. This product approval also provides a label for the product that designates how long the certification will last. The NOA also includes information on dimensions, parts, materials, accessories, and installation guidelines for a product. Impact-resistant products also come with a sticker adhered to the window glass or door frame with the product approval information on it. It is important to remember not to remove these stickers because they are useful to identify your products and to qualify for insurance discounts.