JKES offer the CC BY-NC license.
Allows users to: distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator. CC BY-NC includes the following elements:
BY: credit must be given to the creator.
NC: Only noncommercial uses of the work are permitted.
To request permission for a type of use not listed, please fill up the permission request form and e-mail it to kecs98@kecs.or.kr or fax it to +82-2-568-5931.