وَيَنْقُضُهُ نَاقِضُ الْوُضُوءِ وَالْقُدْرَةُ عَلَى اسْتِعْمَالِ الْمَاءِ الْكَافِي
Tayammum is invalidated by:
1. Anything that invalidates Wudu.
2. Regaining the ability to use enough water, including the disappearance of the excuse that permitted Tayammum.
This is an essential completion of the Tayammum chapter and was previously missing from the course.