What is a mandatory aspect of using a tower stand?

A strong, level base is essential for using a tower stand because it ensures both safety and stability when hunting. A stand that is not level can lead to wobbling or tipping, which poses a serious risk to the hunter's safety. Proper construction with a strong base is crucial to prevent accidents, especially when climbing up or down or when maneuvering while in the stand.

The other options either do not address safety requirements or are not necessary for the functional use of the tower stand. Bright colors might help with visibility for others, but they are not mandatory. The material of the stand can vary; it does not have to be metal, as wood can also be a suitable choice as long as it is sturdy. Lastly, including a ladder is often necessary for safely accessing the stand; therefore, stating that it should not have a ladder contradicts standard safety practices.