Yes, the contributor terms mean that you can only import data that is (effectively) public domain data or data for which you have explicit permission to import it into OSM. public domain in this context includes CC0, WTFPL, Unlicense, etc.etc. ---------- Also note the other pitfalls for imports mentioned many times in other responses here and on the [wiki][1]. [1]: http://wiki.openstreetmap.org/wiki/Import

Yes, the contributor terms mean that you can only import data that is (effectively) public domain data or data for which you have explicit permission to import it into OSM. public domain in this context includes CC0, WTFPL, Unlicense, etc.