The THIRD major problem is with the Optional Protocols.
The Optional Protocols were added to the Convention to try to improve protections for children everywhere.
Three have been added, the first two on the 25 May, 2000.
The first Optional Protocol was restricting the involvement of children in military conflicts.
Currently, 170 member states are party to that protocol, and another 10 member states have signed but not ratified it yet.
The second Optional Protocol prohibits the sale of children, child prostitution and child pornography. To date, 176 member states are party to that protocol, and another 7 member states have signed but not ratified it yet.
The USA, to their credit, have ratified both these protocols.