Yellow in Sherpa: Author's Pre-print: author can archive pre-print (ie pre-refereeing)
Author's Post-print: subject to Restrictions below, author can archive post-print (ie final draft post-refereeing)
Restrictions: 2 years embargo
Publisher's Version/PDF:  author cannot archive publisher's version/PDF
General Conditions: Pre-print can only be posted prior to acceptance
    Pre-print must be accompanied by set statement (see link)
    Pre-print must not be replaced with post-print, instead a link to published version with amended set statement should be made
    Pre-print on author's personal website, employer website, free public server or pre-prints in subject area
    Post-print on institutional repositories or central repositories
    Publisher's version/PDF cannot be used.
27.5.15--MMM