; and (2) by inserting after the item relating to section 5545b the following: 5545c. Incident response premium pay for employees engaged in wildland firefighting. . (d) Effective date The amendments made by this section shall take effect on the first day of the first applicable pay period beginning on or after October 1, 2023. 4. Conditions in Forest Management (a) Mandatory use of existing authorities Not later than 120 days after the date of enactment of this Act, and annually after, with respect to each unit of public lands and within each unit of covered National Forest System lands, the Secretary concerned shall use not fewer than 1 of the following streamlined authorities including the authorities for environmental review: (1) Section 603(a) of the Healthy Forests Restoration Act of 2003 ( 16 U.S.C. 6591b(a) ). (2) Section 605(a) of the Healthy Forests Restoration Act of 2003 ( 16 U.S.C. 6591d(a) ). (3) Section 606(b) of the Healthy Forests Restoration Act of 2003 ( 16 U.S.C. 6591e(b) ). (4) Section 40806(b) of the Infrastructure Investment and Jobs Act ( 16 U.S.C. 6592b(b) ). (5) Section 40807 of the Infrastructure Investment and Jobs Act ( 16 U.S.C. 6592c ). (6) Section 207 of the Wildfire Suppression Funding and Forest Management Activities Act ( 16 U.S.C. 6591c ). (b) Covered National Forest System lands defined In this section, the term covered National Forest System lands means any area— (1) located within National Forest System lands; (2) that the Forest Service has identified as being located in a fireshed ranked in the top 25 percent of wildfire exposure (as determined using the most recently published models of fireshed risk exposure published by the Forest Service); or (3) that the U.S. Drought Monitor has rated as having a D2 (severe drought) intensity, D3 (extreme drought) intensity, or D4 (exceptional drought) intensity.