Policy on removing non-baptised people from MLS

We have several families in our ward that are members, but not active, and have had children that have never been baptized. Is there a policy that states at what age (or point) that these people are removed from MLS because they are not members of the church and are on our records because of the affiliation of a parent?

Handbook 1: 13.6.2 explains the process. They have to be at least 18.

My interpretation is that you'd also need to contact them. That's easier said then done.

Got it and thank you!