Ingrid! Happy New Year! :-D
I just took a look @ the Knitty article, and it's still not clear, but only because I'm not sure if the lace pattern used in the socks is a "traditional" lace pattern or an Elizabeth Clark original. I've searched a few online stitch libraries and have yet to find it.
I wonder if I'd be covering my bases if I gave credit to E. Clark re: the lace pattern, and I wouldn't necessarily have to use her chart for the pattern, either. Because I'm adding a border and a slipped stitch "seam" on the scarf, I'm writing out everything in text anyway.
Also, I don't think posting the lace pattern as part of the scarf pattern would be an infringement on her sock pattern because it's not giving away the sock pattern; however, I do understand that original lace designs deserve just as much consideration as the garment pattern.
I guess I need to go and think about what to do. Heck ... maybe the scarf won't turn out right, anyway. (But I hope not!)