42 C.F.R. § 11.22
(a) General specification.
(b) Determination of applicable clinical trial for a clinical trial or study initiated on or after January 18, 2017. A clinical trial or study that, at any point in time, meets the conditions listed in paragraph (b)(1) or (2) of this section will be considered to meet the definition of an applicable clinical trial.
(1) Applicable device clinical trial. A clinical trial or study that meets the conditions listed in either paragraph (b)(1)(i) or (ii) of this section is an applicable device clinical trial:
(ii) The study is a clinical trial with one or more arms that meets all of the following criteria:
(D) One or more of the following applies:
(1) At least one Facility Location is within the United States or one of its territories,
(2) A device product under investigation is a Product Manufactured in and Exported from the U.S. or one of its territories for study in another country, or
(3) The clinical trial has a U.S. Food and Drug Administration IDE Number.
(2) Applicable drug clinical trial. A clinical trial with one or more arms that meets the following conditions is an applicable drug clinical trial:
(iv) One or more of the following applies: