; or (DD) notify the parties in writing that the Committee has completed all action under this section with respect to the transaction. (bb) Timing The Committee shall take action under item (aa) not later than 30 days after receiving a declaration under this clause. (cc) Rule of construction Nothing in this subclause (other than item (aa)(CC)) shall be construed to affect the authority of the President or the Committee to take any action authorized by this section with respect to a covered transaction. (IV) Mandatory declarations (aa) Regulations The Committee shall prescribe regulations specifying the types of covered transactions for which the Committee requires a declaration under this subclause. (bb) Certain covered transactions with foreign government interests (AA) In general Except as provided in subitem (BB), the parties to a covered transaction shall submit a declaration described in subclause (I) with respect to the transaction if the transaction involves an investment that results in the acquisition, directly or indirectly, of a substantial interest in a United States critical infrastructure company or United States critical technology company by a foreign person in which a foreign government has, directly or indirectly, a substantial interest. (BB) Exception The submission of a declaration described in subclause (I) shall not be required with respect to a transaction described in subitem (AA) if each foreign person that is a party to the transaction, and each foreign person with ownership or control over a party to the transaction, is from a country or part of a country identified by the Committee under subsection (a)(5)(C)(iii). (CC) Substantial interest defined In this item, the term substantial interest has the meaning given that term in regulations which the Committee shall prescribe. In developing those regulations, the Committee shall consider the means by which a foreign government could influence the actions of a foreign person, including through board membership, ownership interest, or