ततः परं धर्मस्थैर्विसृष्टा यथेष्टं विन्देत ॥ कZ_०३.४.३५ ॥
tataḥ paraṃ dharmasthaiḥ visṛṣṭā yatheṣṭaṃ vindeta
After that (waiting period), once released by the judges (dharmasthas), she may act as she chooses (including contracting a new union).
To prevent private disputes and retaliatory claims; the state converts a socially volatile issue into a documented, enforceable judgment.