"Carrying another person" being the key phrase. Direct from Patty Wagstaff herself in a public forum; if you're solo, you don't legally need to wear a chute'. if you do however, it's gotta be properly packed and within date.
Absolutely! Just figured I'd put it up for detailed support. However, I wear a chute whenever I fly aerobatics, even if it's down low during an airshow because I want the ability to at least TRY and get out if I need to.