Cisco Ncs 540 and licensing model

Hello community,

We are currently looking at some N540-28Z4C and we are having some trouble understanding the licensing model. The router has 28X10G and 4X100G.

When it come to 10G ports. We would need to buy 1*RTU license + 1*Term license (3-5 years) both mandatory. What is not clear is what happens when the term is over.. Does the ports would just drop like this? Which would be a time bomb.. Or those license are just honor based?

Also our Cisco AM told us that there is no license required for the 4x100G ports which doesn't really make sense when you read about 10G licensing model..

Does someone use of those and can bring an honest opinion/clarification about the above?

thanks