USEF horse registration question

My horse will be moving up to prelim in April with his rider, I am not the rider, just the owner. I have not registered him yet with USEF. Do I have to be a USEF member in order to register him with USEF? Thanks!

Here is a link to the USEA table of registration requirements
http://useventing.com/sites/default/files/usea_usef_fei_membership_horse_registration_requirements.pdf

Note that at Prelim

A The HORSE does NOT require USEF recording.

B The OWNER DOES need USEF membership (or pay $30 per competition)

So, yes YOU do need to join USEF(or pay $30 per competition)

at prelim, horse does need a USEF horse ID number, which is free to usef members.