StacksVerified U.S. regulatory reference

40 CFR §450.11

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)New source. New source means any source, whose discharges are defined in 40 CFR 122.26(b)(14)(x) and (b)(15), that commences construction activity after the effective date of this rule.
  2. (b)Infeasible. Infeasible means not technologically possible, or not economically practicable and achievable in light of best industry practices.