The CDC has released their plan for establishing their policy for public access to scientific publications that arise form CDC funding.
Based on the CDC Plan:
The CDC Funded Publications Policy is applicable to peer-reviewed publications published after July 15, 2013.
A CDC-funded author must submit an electronic version of the author's manuscript to the National Institutes of Health Manuscript Submission System (NIHMS) upon acceptance for publication.
For additional information on using NIHMS, please see the following:
The manuscript version required is the final, peer-reviewed accepted manuscript. This manuscript is the version of the article that has been accepted for publication and includes all changes made by the author during the peer-review process. It does not include the publisher's formatting.
For the CDC, the maximum allowed embargo period is 12 months from date of publication.