You can take clones from a plant at 12/12 if she hasn't been at that light schedule long. I figure I can take cuttings without waiting the extra month or so if I take them the first week at 12/12 After 7-10 she will start to actually flower and then you have the extra time to wait. Also, I've found that clone moms need to be at least 5 weeks in dirt themselves to give up viable clones.
Good luck, BigSteve.