NAIA is not affliciated with the NCAA, which means that they have their own set of transfering rules.  If transferring from an NAIA institution to a NCAA institution an athlete must abide by the NCAA eligibility and transfer requirements. Check out this article that explains more. Transfering from another NAIA institution:

• Get A Release Form The athlete must get a release from their current institution and meet all the NAIA eligibility requirements.
• 16 Week Sit-Out Transfer must “sit out” for 16 weeks, unless they transfer from a two-year institution,  never competed at the previous institution, or receive a 2.0 GPA and a written release from their previous institution.
• Coaches Can't Initiate Contact A coach or another representative of a member institution shall not initiate contact with an athlete who has enrolled at another institution.
• Must Be Enrolled A coach or another representative of a member institution may respond to a contact by an athlete only after the enrolled athlete's institution (athletics director or faculty athletics representative) has been notified as prescribed above.
• Pre Season Limitations A coach or another representative of a member institution shall not contact an athlete who has drawn equipment and is engaged in organized pre-season practice at another institution.
• Violation of any part of the recruitment policy shall cause an immediate investigation by the National Conduct and Ethics Committee for appropriate action.