I'm having some trouble understanding exactly what the [American Physical Society (APS) transfer of copyright agreement](http://journals.aps.org/authors/transfer-of-copyright-agreement) does and does not permit, and I was wondering whether someone here may have a clearer insight or previous contact with them to know exactly what their position is. Their [copyright FAQ](http://journals.aps.org/copyrightFAQ.html#eprint) is, I feel, not clear enough on the subject, and it's not quite clear how I should contact them about this.

The relevant paragraphs from the copyright transfer agreement are, I think

> 
> 2. The nonexclusive right, after publication by APS, to give permission to third parties to republish print versions of the Article or a translation thereof, or excerpts therefrom, without obtaining permission from APS, provided the APS-prepared version is not used for this purpose, the Article is not republished in another journal, and the third party does not charge a fee. If the APS version is used, or the third party republishes in a publication or product charging a fee for use, permission from APS must be obtained.
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and 

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> 4. The right to post and update the Article on free-access e-print servers as long as files prepared and/or formatted by APS or its vendors are not used for that purpose. Any such posting made or updated after acceptance of the Article for publication shall include a link to the online abstract in the APS journal or to the entry page of the journal. If the author wishes the APS-prepared version to be used for an online posting other than on the author(s)’ or employer’s website, APS permission is required; if permission is granted, APS will provide the Article as it was published in the journal, and use will be subject to APS terms and conditions.
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The latter one looks pretty inclusive, but it does not specify whether all licensing schemes for e-print servers are acceptable or not. Similarly, in their I am worried, in particular, by a note in the [arXiv license help page](http://arxiv.org/help/license):

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> The Creative Commons Attribution license in particular, permits commercial reuse and thus conflicts with many journal agreements.
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In particular, posting to an e-print server may be construed as overstepping the rights granted by point 2 of the agreement, since it can be used by a third party as permission to republish it in print and charge a fee for it. If that is the only objection, then choosing a [CC Noncommercial-ShareAlike](http://creativecommons.org/licenses/by-nc-sa/3.0/) license would be compatible with the above.

I have two specific questions about this.

* **Is my reading of these publicly available documents correct?** Did I miss important information either on these or other publicly available resources?
* Does anyone have specific experience with them regarding this question? Is there some specific contact for these matters?

(I believe the [non-exclusive license to distribute](http://arxiv.org/licenses/nonexclusive-distrib/1.0/license.html), which is the most restrictive arXiv license, is definitely compatible. This question is mostly about the Creative Commons licenses.)