>The SAVE Act lists several types of documentation that would be accepted, including a form of identification issued consistent with the requirements of the REAL ID Act of 2005, a valid United States passport, valid military ID, forms of Tribal identification and proof of naturalization. Many of these forms of ID, other than a passport, either include a birth certificate or must be presented alongside a birth certificate.

I do not understand why it is "alongside" most of these forms of ID require a birth certificate in the first place.