LL 23.5.13. Blue in OakList: Pre-Print :   Author CANNOT archive preprint version (i.e. submitted version - pre-refereeing)  
Post-Print :   Author CANNOT archive postprint (i.e. accepted version - post refereeing)  
Publisher Version :   Author CAN archive publisher version. 18.6.13-MMM. Requested Permission form 6.1.14-MMM