The Army Just Announced 2 Big Uniform Changes

SSG (Join to see) , you mean like what color t-shirt I can wear underneath my ASUs or OCPs? Or perhaps you're referring to the all important question of "How come I can only wear one watch and one bracelette?"

I haven't seen anything that states that. Anything else I have to offer will be solely personal opinion. :)

SSG (Join to see) - I don't think AR670-1 has been updated to address the gender issue.

After receiving the transgender class, my interpretation is that it will be whatever gender marker is shown in DEERS. Bottom line is that women can wear nail polish, it just has to be clear.

LTC (Join to see) - According to the most recent training, it's whatever gender is in DEERS. So if you've gone through the proper steps to transition (which are extensive) and you are Female in DEERS, the female rules apply.

So no, it's not necessarily biological sex at birth. It's whatever the personnel system marks the soldier as.

I'm guessing it has to do with Caisson PLT from the 3d Inf Regt.

Code: D2
Title: Military Horseman
Proponent: 3D U.S. Infantry Regiment (The Old Guard)
a. Description of positions. Identifies personnel with basic horsemanship skills in all aspects of horsemanship, to include riding and ceremonial tack identification and application, horse safety, proper groundwork, riding to include western and ceremonial. Personnel will be trained in basic equine medical aid, knowledge of basic horse anatomy as well as maintaining the health and welfare of military working horses.
b. Qualifications. Must successfully complete the nine week U.S. Army Caisson Platoon Basic Horsemanship Course, Fort Belvoir VA Equine Training Facility.
c. Restrictions. For use with personnel only. For use with any AOC.

http://www.oldguard.mdw.army.mil/specialty-platoons/caisson