Cho-Dan... Juego Todo, I have seen some dojangs that require Kwang-Gae (and even Po-Eun and Gae-Baek) for testing to Cho-Dan (1st Degree). However, this is not the requirement of either the ITF or its forerunner the Oh Do Kwan. General Choi Hong Hi required all patterns up to and including Choong-Moo! The other three are to be learned by the 1st Degree. TAEKWON! Spookey
I've seen that form done 10 different ways. Some differences can be subtle some quite dramatic. All depends on who teaches it.
I'm actually a red tag. I haven't learned Hwa Rang yet. I just got my tags on Saturday so haven't learned Toi Gye yet. Sorry for the confusion