; (B) the unique demands of the mission to remotely pilot aircraft; and (C) limited access to essential services, including child care, housing, and readily accessible health care; and (2) the overall cost to the United States, and financial relief provided by, such assignment incentive pay authorized by the Secretary of the Air Force in 2008 for such members. C Allowances 621. Modification of calculation of gross household income for basic needs allowance to address areas of demonstrated need (a) In general Section 402b(k)(1)(B) of title 37, United States Code, is amended by inserting or that otherwise has a demonstrated need after high cost of living . (b) Implementation guidance The Secretary of Defense shall revise the guidance issued with respect to implementation of the basic needs allowance under section 402b of title 37, United States Code, to reflect the amendment made by subsection (a). 622. Improved calculation of basic allowance for housing for junior enlisted members Section 403 of title 37, United States Code, is amended, in subsection (b)(5), by striking and shall be based and all that follows and inserting a period. 623. Basic allowance for housing for members assigned to vessels undergoing maintenance Section 403(f)(2) of title 37, United States Code, is amended— (1) in subparagraph (A), by striking subparagraphs (B) and (C) and inserting subparagraphs (B), (C), and (D)