Even though we can authorize it in our System Prefs>App Store.
You are authorizing what in the Pref Pane? That the license be changed to be transferable to another person? Please post a screenshot of what you think is an appropriate answer to the licensing question.
FWIW, Have you read the SLA?
http://images.apple.com/legal/sla/docs/OSX1010.pdf
Excerpt:
H. Other Use Restrictions
The grants set forth in this License do not permit you to, and you agree not
to, install, use or run the Apple Software on any non-Apple-branded computer, or to enable others to do
so. Except as otherwise permitted by the terms of this License or otherwise licensed by Apple: ℹ only
one user may use the Apple Software at a time, and (ii) you may not make the Apple Software available
over a network where it could be run or used by multiple computers at the same time. You may not rent,
lease, lend, sell, redistribute or sublicense the Apple Software.