; (2) in calendar year 2026, 55%; (3) in calendar year 2027, 60%; (4) in calendar year 2028, 65%; (5) in calendar year 2029, 70%; (6) in calendar year 2030, 75%; (7) in calendar year 2031, 80%; (8) in calendar year 2032, 85%; (9) in calendar year 2032 and thereafter, 85%. (b) The Secretary may take action that the Secretary deems necessary or appropriate to administer, implement or enforce the Trusted Source Requirement. (c) The Secretary may require any person to provide any certifications, reports, or other information necessary or appropriate to demonstrate compliance with the Trusted Source Requirement. (d) (1) The Secretary shall promulgate, no later than twelve months after the enactment of this section, a final regulation to implement this section. (2) In promulgating the final rule, the Secretary shall consider the need for: (A) Mechanisms to allocate the effects of the Trusted Source Requirement equitably among reactor licensees; (B) Differentiation among various reactor types; (C) Differentiation among LEU enriched up to 10 percent of the uranium-235 isotope and LEU enriched above10 percent of the uranium-235 isotope