8 C.F.R. § 214.208
(c) Reasonable requests. An applicant need only show compliance with reasonable requests made by an LEA for assistance in the investigation or prosecution of the acts of trafficking in persons. The reasonableness of the request depends on the totality of the circumstances. Factors to consider include, but are not limited to:
(d) Evidence. An applicant must submit evidence that demonstrates that they have complied with any reasonable request for assistance in a Federal, State, Tribal, or local detection, investigation, or prosecution of trafficking in persons, or a crime where trafficking in persons is at least one central reason for the commission of that crime. In the alternative, an applicant can submit evidence to demonstrate that they should be exempt under paragraph (e) of this section. If USCIS has any question about whether the applicant has complied with a reasonable request for assistance, USCIS may contact the LEA. The applicant may satisfy this requirement by submitting any of the following:
(e) Exception or exemption. An applicant who has not had contact with an LEA or who has not complied with any reasonable request may be excepted or exempt from the requirement to comply with any reasonable request for assistance in an investigation or prosecution if either of the following circumstances apply:
(1) Trauma. The applicant is unable to cooperate with a reasonable request for assistance from an LEA in the detection, investigation, or prosecution of acts of trafficking in persons due to physical or psychological trauma. An applicant must submit credible evidence of the trauma experienced. The applicant may satisfy this exception by submitting: