When are weapons taught?

There are of course differences between "styles" of Hapkido (pretty sure I've seen that argument somewhere around here before), and differences from school to school, and instructor to instructor.  But at your schools, what weapons are taught at what level?  Is it set in stone?   Or does it depend more on the student?

I ask because I am interested in learning cane.  I think they look really fun.  However, they aren't taught until second dan in KSW (still some years away).

In KSW weapons are not required to achieve colored belt rankings. But if one wishes to learn them most teachers teach them at these levels.  Though by no means do all teachers know or teach all the weapons.

Jool Bong (Nunchaku) are taught at white, yellow, or above.

Jung Bong (Standard staff) - yellow or blue belt.

Gum (curved blade, Korean slicing sword) at first dan.

Jung Gum (strait blade, Korean piercing sword) at first dan [though far less common then standard Gum).

Rope - second dan.

Short Staff - Not sure, but seen quite a few short staff demonstrations, definitely second or higher.

Cane - second or third dan.

Bu Chae (Fan) third dan.

Spear - Not sure, at least third or higher.

Halbred - fifth dan or so.

Knives (both fighting and throwing) not sure on when techniques are taught but there are often throwing competitions at tournaments (seen some scarily good underbelts).

Korean Bow and Arrow - Taught by only a few schools around the world, no idea the level.

Battle Axe - Not sure.

Long staff - Not sure

Dan Gum (straight bladed short sword) not sure.

Segmented Staff - Never actually seen anyone ever use one, just seen them on the wall as decor.

there are about a dozen more that I'm missing, but my mind is coming up blank at the moment.