Can Special Attacks be used to perform a Cross-Up?
The rules in the combat section state (emphasis mine):
If a combatant can jump forward 2 Ranges to attack with a Basic Move and land exactly at Range 0, and then chooses to spend an additional 1 FS, the combatant can do a Cross-Up Attack.
A Basic Move is, by definition, not a Special Move, and thus cannot have Elements or Liabilities associated with it.
However, there is a Liability named Cross-Up Liability that can be added to Special Moves that reads (emphasis mine):
This move can only be used if it is used in a Cross-Up situation. Otherwise, it automatically misses.
Also by definition, a Liability can only be added to Special Moves, and not to Basic Moves.
How does this interact? It appears that it is possible to make a Special Move that can only be used as a Cross-Up, but it also appears that Special Moves cannot be used to Cross-Up at all.
Does the Liability also grant the ability to Cross-Up? (Generally, Liabilities are strictly negative effects, and such a beneficial effect would require an Element.) Does the word "situation" mean that it can be used in a similar scenario, but does not gain the usual benefits of being a Cross-Up? Is there another way to make Special Moves able to Cross-Up? Are one of the rules incorrect?