StacksVerified U.S. regulatory reference

40 CFR §1045.107

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Not-to-exceed emission standards apply as follows:
  1. (a)Measure emissions using the not-to-exceed procedures in subpart F of this part:
  2. (b)Determine the not-to-exceed standard, rounded to the same number of decimal places as the emission standard in Table 1 to this section from the following equation:
  3. (c)For engines equipped with a catalyst, use NTE multipliers from the following table across the applicable zone specified in § 1045.515:
  4. (d)For two-stroke engines not equipped with a catalyst, use an NTE multiplier of 1.2 for HC + NOX and CO. Compare the weighted value specified in § 1045.515(c)(5) to the NTE standards specified in paragraph (b) of this section.
  5. (e)For engines not covered by paragraphs (c) and (d) of this section, use the NTE multipliers from the following table across the applicable zone specified in § 1045.515: