; and (ii) the term medical isotope means a radioactive or stable form of an element that is either administered directly into a patient or is combined with a carrier molecule for diagnosis and treatment of disease. (3) Special rule (A) In general The President shall not be required to impose the application of sanctions under section 4, 5, or 6 for a transaction or transactions with a United States person, a foreign person, or a foreign financial institution (as the case may be) described under such if the President certifies in writing to the appropriate congressional committees that— (i) the person— (I) is no longer engaging in activities of a foreign person described in paragraph (3), (4), or (5) of section 5(a), or section 6; and (II) has taken and is continuing to take significant verifiable steps toward terminating such activities; and (ii) the President has received reliable assurances that the person will not engage in such activities in the future. (B) Clarification of applicability The authority described in subparagraph (A) may apply to contracts that— (i) have entered into force prior to February 24, 2022, and have not been extended or renegotiated since their entry into force; and (ii) do not extend beyond January 1, 2028, for fuel and services. (4) Notification Not later than 15 days prior to the issuance of the exercise of a waiver under paragraph (1) or (2) or the special rule under paragraph (3) with respect to United States person, a foreign person, or a foreign financial institution (as the case may be), and every 180 days there after while the waiver or special rule (as the case may be) remains in effect, the President shall notify the appropriate congressional committees on the status of the involvement of the person in activities that meet the criteria described in sections 4, 5, and 6. (b) Exceptions Sanctions described under section 4, 5, or section 6 shall not apply to— (1) authorized intelligence, law enforcement, or national security activities of the United States