; and (C) be computed as described in paragraph (2) and adjusted at the time of adjustments in the General Schedule. (2) Computation (A) In general The special base rate for a wildland firefighter shall be derived by increasing the otherwise applicable General Schedule base rate for the wildland firefighter by the following applicable percentage for the grade of the wildland firefighter and rounding the result to the nearest whole dollar: (i) For GS–1, 42 percent. (ii) For GS–2, 39 percent. (iii) For GS–3, 36 percent. (iv) For GS–4, 33 percent. (v) For GS–5, 30 percent. (vi) For GS–6, 27 percent. (vii) For GS–7, 24 percent. (viii) For GS–8, 21 percent. (ix) For GS–9, 18 percent. (x) For GS–10, 15 percent. (xi) For GS–11, 12 percent. (xii) For GS–12, 9 percent. (xiii) For GS–13, 6 percent. (xiv) For GS–14, 3 percent. (xv) For GS–15, 1.5 percent. (B) Hourly, daily, weekly, or biweekly rates When the special base rate with respect to a wildland firefighter is expressed as an hourly, daily, weekly, or biweekly rate, the special base rate shall be computed from the appropriate annual rate of basic pay derived under subparagraph (A) in accordance with the rules under section 5504(b). . (b) Clerical amendment The table of sections for subchapter III of chapter 53 of title 5, United States Code, is amended by inserting after the item relating to section 5332 the following: 5332a. Special base rates of pay for wildland firefighters. . (c) Prevailing rate employees Section 5343 of title 5, United States Code, is amended by adding at the end the following: (g) (1) For a prevailing rate employee described in section 5342(a)(2)(A) who is a wildland firefighter, as defined in section 5332a(a), the Secretary of Agriculture or the Secretary of the Interior (as applicable) shall increase the wage rates of that employee by an amount (determined at the sole and exclusive discretion of the applicable Secretary after consultation with the other Secretary) that is generally consistent with the percentage increases given to wildland