Why would a state want a TAN to monitor another state's compliance instead of doing the monitoring itself?

Question

Quizplus · Accepted Answer

Monitoring can be a costly activity for states, as it requires resources and expertise. By delegating the task to a TAN, the state can save on costs while still achieving their goals. TANs often have specialized knowledge and resources to conduct monitoring activities, which can be more efficient and effective than if the state were to do it themselves.

Why Would a State Want a TAN to Monitor Another