Entry and nonaddition rule

This regulation establishes the "entry and nonaddition rule," which restricts what types of airplanes can operate to or from airports in the contiguous United States based on their noise levels.

The basic rule is straightforward: you can operate Stage 3, 4, or 5 (quieter) airplanes without restriction. However, Stage 2 (noisier) airplanes face significant limitations and can only operate if they meet specific grandfather provisions—such as being owned by a U.S. person since November 5, 1990, or operating under certain pre-existing leases with specific dates.

The regulation's purpose is to phase out noisier Stage 2 aircraft from U.S. operations while protecting existing ownership and lease arrangements that predated the rule. Foreign air carriers and operators have limited exceptions. Even when Stage 2 aircraft qualify under these provisions, they remain subject to additional operating restrictions found in other sections of this subpart.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*