Disable/Enable Charge Gold & Lumber

I'm attempting to use Charge Gold and Lumber in a Spellbook. I already know that this ability ignores or abuses many if not most of the conventions of regular abilities, like requirements and leveling.

However, what I'd like to do is to Enable/Disable the ability via trigger.

Previously it has been mentioned that it can be Enabled and Disabled but the poster didn't say whether that had been tested.

I can't get Disable to work (and thus probably not Enable either) with this ability, though. Can anyone confirm this flaw?

try to engineer upgrade it...