; (C) be adjusted at the time of any adjustments to the rates of pay under the General Schedule; and (D) begin to apply in the first pay period beginning on or after October 1, 2023. (2) Rates of pay The special rate of basic pay for a wildland firefighter shall be derived by increasing the otherwise applicable General Schedule rate of basic pay applicable to such wildland firefighter by the following percentage amount, rounded to the nearest whole dollar: (A) GS–1, 42 percent. (B) GS–2, 39 percent. (C) GS–3, 36 percent. (D) GS–4, 33 percent. (E) GS–5, 30 percent. (F) GS–6, 27 percent. (G) GS–7, 24 percent. (H) GS–8, 21 percent. (I) GS–9, 18 percent. (J) GS–10, 15 percent. (K) GS–11, 12 percent. (L) GS–12, 9 percent. (M) GS–13, 6 percent. (N) GS–14, 3 percent. (O) GS–15, 1.5 percent. (b) Prevailing rate employees For any prevailing rate employee described in section 5342(a)(2)(A) of title 5, United States Code, who is a wildland firefighter, during fiscal year 2024 and 2025, the Secretary of Agriculture or the Secretary of the Interior (as applicable) shall increase the wage rates of such employees by amounts that are generally consistent with the percentage increases given to wildland firefighters in the General Schedule under subsection (a). Such an increased wage rate— (1) shall begin to apply in the first pay period beginning on or after October 1, 2023; (2) shall be determined at the sole discretion of the applicable Secretary, after consultation with the other Secretary; (3) shall be basic pay for the same purposes as the wage rate otherwise established under section 5343 of such title