Further statements on application of the policy

How is the granting of a non-exclusive licence to Politecnico di Milano compatible with making it able to exercise all copyright rights?

The legal framework of copyright is that it is impossible to give away what you don't have. The Politecnico has been granted non-exclusive rights; therefore it will not, in turn, but able to grant exclusive rights. 

The Politecnico di Milano, however, will be able to exercise all the other user rights protected by copyright, including reproduction, visualisation, distribution and the possibility of creating works coming from articles that come under the policy, on the condition that these activities are not for the purpose of making profit.

Why is this an automatic requisite? Why not suggest that each author must individually preserve a licence for open access distribution?

Experience has shown that the "opt in" systems have little effect on the authors' conduct. For example, in the United States, before the American Congress had made it a necessary requisites, participation in the NIH public access policy was optional. During that period, the level of compliance was only 4%. Experience in many sectors showed that the "opt out" systems manage to obtain much higher degrees of participation compared to "opt in" systems.

The individual authors will benefit from a single, organic policy as it makes it possible for the Politecnico di Milano to work with publishers on the authors' behalf, simplify procedures and increase access.

Why are images not included in the policy?

Images are created by professors in a wide range of contexts and for a wide range of purposes that are too complex to include images in the policy. However, to the extent that the images are contained in the articles, they will be covered by the policy.

Why does the policy not offer an embargo period before publishing the articles, so that the Politecnico di Milano version does not appear until after official publication?

Different subjects have very different lifetimes for journal articles, which makes it very difficult to include a certain period of time in a global policy. However, "opt out" exists for authors whose publishers request a delay prior to making articles available.