What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?

Erklärung

Where the angle modulation standard applies, which is the phone and image segments below 29.0 MHz, the modulation index may not exceed 1 at the highest modulation frequency. The 29.0-29.7 MHz segment on 10 meters is not subject to that standard, which is why wider deviation FM is usable there.