The CHI/AMS link is a 10Gbps lambda implemented between StarLight and NetherLight. Since no IP routers are on the lambda, there are no routing policies.
Lightpaths are L1 point-to-point connections, so traditional peering policies do not apply. Peering is based on the GLIF principle that resources are shared among collaborating participants; the owner of any resource decides on its use.
The NYC/AMS link is a routed, L3 connection providing connectivity among GÉANT2 in Europe and the Internet2, DoE ESnet, NLR and CANARIE networks at the MAN LAN exchange point in New York City. While other links between Internet2 and GÉANT2 exist, this link is being preferred for traffic between Internet2 and GÉANT2.