Right, sloppy "half chaps" are not allowed. Nicer boot-style leggings with matching paddock boots are. I encourage my students to wear them on XC. Anyone who has had to have a custom boot pulled off of a broken leg (I threatened to hurt the doctor if he cut it off! LOL!) will encourage it.
My friend wore half chaps on XC once, because she's 12 and didn't own full length boots. She wasn't penalized for it.... it was at a regonized BN show too. *shurgs* maye it's different for some shows? She wore those garterish things in dressage and stadium...
I grew up in Pony Club and was always taught that tall boots are the only acceptable way to go. Now-a-days, I see so many wearing paddock boots and 1/2 chaps, over jeans...ugh.....I cringe whenever I see that.
I grew up that way though :) It was ingrained in me and always will be.
1/2 chaps are ok for playing around at home at in a lesson, if the coach permits it - but aside from that, you should always dress respectable.