What is a primary requirement printed on every issued permit?

The primary requirement that is printed on every issued permit is the provisions of the permit. This is crucial because the provisions outline the specific conditions, limits, and regulations under which the permitted activities can take place. They ensure compliance with legal and safety standards, and they provide guidance on how mining operations should be conducted to minimize risks and protect both workers and the environment.

In relation to the other options, while contractor's contact information or safety guidelines could be important elements associated with a permit, they are not universally mandated to be printed on every permit itself. Mining equipment specifications are typically not included directly in the permit but may instead be governed by safety regulations or standards set forth by regulatory bodies. Thus, the provisions of the permit serve as the essential framework needed for operations, ensuring that miners are aware of their responsibilities and the requirements they must follow.