No, vanity is:
DMIMGUD or
2HT4U or
WBMSTR or some such.
Quoting the Bible doesn't seem like vanity at all!
All license plates that aren't in the six- or seven-digit alphanumeric sequence determined by your state are, by definition, vanity plates.
Here's how you tell . . . if you got to pick what your plate says, you have vanity plates.
Even if they say "I LV GOD" or "BIBLE," they're considered "vanity plates."