What must be done before using a new digital protocol on the air?

The FCC encourages amateurs to experiment with new digital codes and protocols, as this is a core part of advancing the radio art. However, FCC rules strictly prohibit the use of codes or ciphers intended to obscure the meaning of a communication. To prove that a new digital protocol is for legitimate communication and not an illegal cipher, its technical characteristics must be publicly documented before it is used on the air. You do not need FCC type-certification or a special experimental license, provided you stay within the amateur bands and publicly share how the protocol works.