What is the difference between Primary Registrant and Companion registrations?

The Primary registrant is our way of designating the original registrant. There must be a Primary Registrant for every family. A Companion Registrant and/or a Family Registrant is a family member, living at the same address, who is registering with the Primary Registrant and is therefore eligible for a reduced registration rate. All registrants are equally eligible to participate in any clinics, tours or other activities, except that entries into the Model & Photo Contests must come from NMRA members.