cameras capable of providing full maritime domain awareness of the United States territorial waters surrounding Puerto Rico, Mona Island, Desecheo Island, Vieques Island, Culebra Island, Saint Thomas, Saint John, and Saint Croix. (b) Tactical flexibility (1) Southern and northern land borders (A) In general Beginning on September 30, 2021, or after the Secretary has deployed at least 25 percent of the capabilities required in each sector specified in subsection (a), whichever comes later, the Secretary may deviate from such capability deployments if the Secretary determines that such deviation is required to achieve situational awareness or operational control. (B) Notification If the Secretary exercises the authority described in subparagraph (A), the Secretary shall, not later than 90 days after such exercise, notify the Committee on Homeland Security and Governmental Affairs of the Senate and the Committee on Homeland Security of the House of Representatives regarding the deviation under such subparagraph that is the subject of such exercise. If the Secretary makes any changes to such deviation, the Secretary shall, not later than 90 days after any such change, notify such committees regarding such change. (2) Transit zone (A) Notification The Secretary shall notify the Committee on Homeland Security and Governmental Affairs of the Senate , the Committee on Commerce, Science, and Transportation of the Senate , the Committee on Homeland Security of the House of Representatives , and the Committee on Transportation and Infrastructure of the House of Representatives regarding the capability deployments for the transit zone specified in paragraph (18) of subsection (a), including information relating to— (i) the number and types of assets and personnel deployed