Definitions apply as described in 40 CFR 1031.205.

Abbreviations apply as described in 40 CFR 1031.200.

Provisions related to the general applicability and requirements of aircraft engine standards apply as described in 40 CFR 1031.1.

Fuel venting standards apply to certain aircraft engines as described in 40 CFR 1031.30(b).

Fuel venting standard apply as described in 40 CFR 1031.30(b).

Exhaust emission standards apply to certain aircraft engines as described in 40 CFR 1031.40 through 1031.90.

Exhaust emission standards apply to new aircraft engines as described in 40 CFR 1031.40 through 1031.90.

Exhaust emission standards apply to new aircraft engines as follows:

(a) New turboprop aircraft engine standards apply as described in 40 CFR 1031.40.

(b) New supersonic engine standards apply as described in 40 CFR 1031.90.

(c) New subsonic turbofan or turbojet aircraft engine standards apply as follows:

(1) Standards for engines with rated output at or below 26.7 kN thrust apply as described in 40 CFR 1031.50.

(2) Standards for engines with rated output above 26.7 kN thrust apply as described in 40 CFR 1031.60.

(d) NOX standards apply based on the schedule for new type and in-production aircraft engines as described in 40 CFR 1031.60.

Exhaust emission standards apply to in-use aircraft engines as described in 40 CFR 1031.60.

Provisions related to derivative engines for emissions certification purposes apply as described in 40 CFR 1031.130.

Provisions related to exceptions apply as described in 40 CFR 1031.20. Provisions related to exemptions apply as described in 40 CFR 1031.10.

Test procedures for measuring gaseous emissions and smoke number apply as described in 40 CFR 1031.140.