Green in Sherpa: author can archive pre-print (ie pre-refereeing).
Author can archive post-print (ie final draft post-refereeing).
Author cannot archive publisher's version/PDF.
•Some individual journals may have policies prohibiting pre-print archiving
•On author's personal website or departmental website immediately
•On institutional repository or subject-based repository after a 18 months embargo
•Publisher's version/PDF cannot be used
•On a non-profit server
•Published source must be acknowledged
•Must link to publisher version
•Set statements to accompany deposits (see policy)
•The publisher will deposit in on behalf of authors to a designated institutional repository including PubMed Central, where a deposit agreement exists with the repository.
The 18 months embargo for accepted version has now lapsed, 
 15.9.15--MMM. Supporting documentation added to dark upload - HD 18/11/19