A Registration is a mandatory requirement to place your products in the USA.
US FDA Registration is given under the USbioterrorism act. After registration, you are allocated a registration number which is used.
US custom authority & other concerned authorities in the USA to establish your genuine identity as a supplier to the USA.
US FDA registration is given in many categories.
Apparat from these US FDA Registration can also be obtained for packaging materials, utensils & some other product categories.