[otoburb]

From the same NASAA FAQ:

>>Do I need to have a sponsor before I take the Series 63, 65, or 66? No. Unsponsored candidates who are not Form U4 registered or currently affiliated with a firm through FINRA’s Web CRD system should open an exam enrollment window via FINRA.org request and pay for the S63, S65, or S66 exams.

So if the S65 and the S63 are both required, then a person can do attempt both without requiring sponsorship from a financial firm. The additional cost of the S63 is another $147 on top of the $187 for the S65 (totaly exam cost $334).