; (2) by striking The term and inserting the following: (A) In general Except as provided in subparagraph (B), the term ; (3) in clause (ii), as redesignated by paragraph (1), by striking subparagraph (A) and inserting clause (i) ; and (4) by adding at the end the following new subparagraph (B): (B) Domestic source for title III (i) In general For purposes of title III, the term domestic source means a business concern that— (I) performs substantially all of the research and development, engineering, manufacturing, and production activities required of such business concern under a contract with the United States relating to a critical component or a critical technology item in— (aa) the United States or Canada; or (bb) subject to clause (ii), Australia or the United Kingdom; and (II) procures from business concerns described in subclause (I) substantially all of any components or assemblies required under a contract with the United States relating to a critical component or critical technology item. (ii) Limitations on use of business concerns in Australia and United Kingdom (I) In general A business concern described in clause (i)(I)(bb) may be treated as a domestic source only for purposes of the exercise of authorities under title III relating to national defense matters that cannot be fully addressed with business concerns described in clause (i)(I)(aa). (II) National defense matter defined For purposes of subclause (I), the term national defense matter is a matter relating to the development or production of— (aa) a defense article, as defined in section 301 of title 10, United States Code