; and (B) ends on the date on which the first National Defense Strategy is submitted to Congress after such date of enactment. . (2) by striking subsection (g); and (3) by redesignating subsection (h) as subsection (g). 7. Definitions and guidance (a) Congressional defense committees In this Act, the term congressional defense committees has the meaning given that term in section 101(a)(16) of title 10, United States Code. (b) Operational challenges In this Act, the term operational challenges means the principal operational challenges to meeting the defense objectives described in the most recent National Defense Strategy, as such challenges are defined by the Secretary of Defense in guidance issued to the Department of Defense. The guidance issued by the Secretary of Defense under the preceding sentence shall— (1) specifically identify operational challenges to the Department’s principal strategic priorities of winning in conflict and competing effectively with China and Russia; and (2) be made available in unclassified and publicly accessible form.