; or (ii) a member of the United States Armed Forces. (d) Definitions In this section: (1) Defense acquisition workforce The term defense acquisition workforce means the Department of Defense acquisition workforce described in chapter 87 of title 10, United States Code. (2) Security cooperation workforce The term security cooperation workforce has the meaning given the term in section 384 of title 10, United States Code. 1399K. Modification of foreign military sales processing (a) Responses (1) Letters of request for pricing and availability The Secretary of Defense shall seek to ensure that an eligible foreign purchaser that has submitted a letter of request for pricing and availability data receives a response to the letter not later than 45 days after the date on which the letter is received by a United States security cooperation organization, the Defense Security Cooperation Agency, or other implementing agency. (2) Letters of request for letters of offer and acceptance The Secretary of Defense shall seek to ensure that an eligible foreign purchaser that has submitted a letter of request for a letter of offer and acceptance receives a response— (A) in the case of a letter of request for a blanket-order letter of offer and acceptance, cooperative logistics supply support arrangements, or associated amendments and modifications, not later than 45 days after the date on which the letter of request is received by a United States security cooperation organization, the Defense Security Cooperation Agency, or other implementing agency; (B) in the case of a letter of request for a defined-order letter of offer and acceptance or associated amendments and modifications, not later than 100 days after such date