http://www.rfc-editor.org/rfc/rfc2939.txt
RFC 2939: Procedures and IANA Guidelines for Definition of New DHCP Options and Message Types, R. Droms2000-09-01T23:00:00-00:00This document describes the procedure for defining new DHCP options and message types. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.