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40 CFR Part 1039 — Control of Emissions from New and In-Use Nonroad Compression-Ignition Engines (Tier 4)

Code of Federal Regulations

Overview

40 CFR Part 1039 establishes the Tier 4 nonroad diesel emission standards and supporting diagnostic and inducement provisions applicable to agricultural and construction equipment.

Repeal relevance: Any DEF-sensor or nonroad inducement reform must be located in Part 1039, not in the on-road Part 1036, and repeal advocacy should be specific about which subparts are targeted.

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Operative language

Short paraphrases of the operative text. Read the full section at the source.

  • 40 CFR Part 1039 (subparts B and D) · Open source

    Part 1039 sets Tier 4 exhaust-emission standards, useful-life values, in-use testing obligations, and diagnostic/inducement provisions for new and in-use nonroad compression-ignition engines, including agricultural and construction equipment.

    Establishes: The nonroad (agricultural/construction) counterpart to the on-road Part 1036 regime.

    Plain English: Agricultural and construction diesels live under Part 1039, not Part 1036. Repeal or DEF-sensor advocacy that targets 'the diesel rule' must specify which part and which subpart.