If not, determine if the publisher will deposit the final published article in PMC by the author's request (method B). There is typically a fee for this, but if arranged, the author need not do anything else and compliance is complete.
For all other articles (method C), in order to discern what version of the article may be deposited into PMC as well any embargo restrictions, review the journal or publisher's instructions to authors for complying with funding body agreements and policies by searching either:
With the exception of the cases noted above, authors must authorize NIH to process the manuscript in NIHMS, as well as designate the number of months after publication when the manuscript may be made publicly available in PMC.
NIHMS will then convert the deposited files into a standard PMC format, and email the author to review and approve the files via the NIHMS System. Corrections to the manuscript, if necessary, may be requested at this time.
If the initial author contacted for approval fails to take action, a request can be sent to NIH to re-assign the approval to another author.