A quick definition of springing use:

Use refers to the way something is used or employed for a specific purpose. It can be a long-term possession and employment of something, like a building used as a dance club, or a right to use property and all that makes it desirable or habitable, such as light, air, and access. There are different types of use, such as conditional use, nonconforming use, and public use. Some uses arise on the occurrence of a future event, like a springing use, while others are dependent on or affiliated with the land's primary use, like an incidental use.