Custom Depreciation Method Name Restrictions

Are there restrictions on the method name?

Custom depreciation method names can include any number or lowercase letter, except for the codes reserved by the system. If you enter uppercase letters, the system changes them to lowercase. (Uppercase letters are reserved for the system's standard depreciation methods.)

The following two-character codes are reserved by the system. Therefore, you cannot enter the following codes in the Enter New Name and Description field of the Custom Depreciation Methods window:

aa	di	mt	sd
ad	dl	no	sf
at	dm	oc	sh
db	dy	rh	sl
dc	ma	rm	st
dd	mf	rv	yd
de	mi	sa	yh
dh	mr	sb	ys