This is what the patch 142 means about DC and SB:
The "formula to craft the spell" will be attuned. You take 75 Nature Lore tokens to Iseru, and you now will get an "Attuned" formula that cannot be traded. This is to stop people who can't craft the spell, the ability to buy it and give it away or sell it, as it takes a tremendous amount of effort to get the 75 Nature Lore Tokens needed.
Basically, if a dragon is capable of scribing the spell, that a dragon or scholar should run out and get NLTs from friends, or quest for them, so they can buy the attuned formula. I guess it is to either stimulate the sale of Nature tokens, or remove DC (and SB) from being sold on connies.
The crafted spell you can give away to anyone.