Under which Creative Commons licence does IOP publish its gold open access articles?

All gold open access articles published by IOP from circa 2013 onwards are, unless stated otherwise, published under the Creative Commons Attribution 3.0 Unported (CC BY 4.0) licence. This means that the article will be freely available for anyone to view and full reuse by third parties is permitted for any purpose.

Most gold open access articles published by IOP prior to 2013 are, unless stated otherwise, published under a Creative Commons Attribution-Non-Commercial-ShareAlike 3.0 (CC BY-NC-SA 4.0) licence. This means that the article will be freely available for anyone to view and reuse for non-commercial purposes, provided that they distribute the content under the same licence.