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 for authors post-print. 
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 in Institutional repositories or Central repositories
    Publisher's version/PDF cannot be used
    Published source must be acknowledged
    Must link to publisher version
    Set phrase to accompany archived copy (see policy)
    Eligible authors may deposit in OpenDepot. --
16.5.16--MMM