How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

In Lower Sideband (LSB) operation, your transmitted voice signal occupies the frequency space directly below your displayed carrier frequency. If you are using a 3 kHz wide LSB signal, your transmission will extend up to 3 kHz lower than the frequency shown on your radio's dial. To ensure your entire signal remains within the permitted phone segment, you must set your carrier frequency at least 3 kHz above the lower edge of that segment. If you tune closer than 3 kHz to the bottom edge, the lower frequencies of your voice audio will spill outside the allowed band, resulting in an out-of-band emission violation. Options suggesting a 1 kHz buffer are incorrect because they fail to account for the full 3 kHz bandwidth of a standard SSB transmission.