I have a question: Is this correct or is that last line on L3 supposed to be on L1?
Shoulder Straps
For 501st approval:
These shall be securely mounted in front and may free float in back. They may be affixed with rivets, Velcro, or adhesive.
For level two certification (if applicable):
No visible rivets are allowed.
For level three certification (if applicable):
These shall free float in back.
These shall be glued in front.
The plastic shoulder straps need to be held down in the back via a white elastic band to the white fabric that connects/bridges the chest and back piece.
The rear tab of the shoulder strap is optional and may or may not be present.