Harvard Library and MIT Libraries provide recommendations for Plan S implementation | MIT Libraries News

"There are two good reasons to broaden the green road. First, green OA is a workable and inexpensive path to OA in all academic fields and regions of the world. Second, barriers to green OA put researchers, particularly early-career researchers, in an untenable situation. A reasonable green OA option will let researchers publish where they must in order to advance their careers, and still satisfy their funders by making their work OA. Without a reasonable green OA option, early-career researchers will be torn between the demands of their funders and the demands of their promotion and tenure committees.

A good green OA option enables authors to submit new work to the journals of their choice, and thereby answers an objection based on academic freedom. If an author’s journal of choice is not OA (or does not satisfy the Plan S criteria for eligible OA journals), then a green option would let the author comply with Plan S by making the work OA in a repository. Plan S has already expanded its original green OA option by allowing deposit of the Author’s Accepted Manuscript or the Version of Record (AAM or VOR), and by making the green OA option permanent rather than limiting it to a transition period.  These are important ways to support a viable green OA option. By adjusting a few other conditions on green OA, Plan S could fully realize its vision of openness to science and scholarship while avoiding needless and damaging barriers to  those who create that science and scholarship...."