What must be reported to the state fire marshal within 15 days?

The correct answer involves the necessity of reporting a change in licensing type to the state fire marshal within 15 days. This is significant because licenses in the fire safety industry are critical for ensuring compliance with state regulations and standards. A change in licensing type typically indicates a modification in the nature of the services being provided, which could affect safety protocols, qualifications for personnel, and operational permissions. Keeping the state fire marshal updated with this information helps maintain regulatory oversight and ensures that all operations remain aligned with safety standards required for protecting public life and property.

While the other options may reflect changes relevant to an organization, they do not carry the same regulatory implications as a change in licensing type. For instance, changes in employment status or business hours, while important for internal administration, do not directly impact the authority or responsibility of an entity under fire safety regulations. Similarly, a change in physical address does require notification for practical purposes, but it is generally less critical in terms of licensing compliance than a change in the type of license held by the business.