I don't see your SCBWI stars so yes, the lapse in membership means that area is not accessible. Maybe the Authors Guild has some statements about this?
If you are using their entire sentence, but only substituting a couple of nouns to fit your story, that looks likes plagiarism and copyright infringement, but I'm not a lawyer.
Also, if something is a cliché "faster than a speeding bullet" then it's part of the culture and not a copyright violation, but you'd want your own take on it. Clichés are good as a short cut but you want your language to be fresh.
These are just a couple of rambly thoughts.
Vijaya