This comment was made by Alexandros Gerontas through the mailing list:
I think the cardinality of the property Has Contact Point should be 0..n. For example, a public service (PS) described once in a regional PS catalogue could have a different contact point at every regional unit.
The current draft of the specifications covers this case, i.e. since the Public Organisation has a Contact Point, it can also be linked to the Public Service. Therefore, it would be possible to have different Contact Points linked to different Public (local) Organisations, for the same Public Service. However, we agree with changing the cardinality to 0..n.