When can the fire marshal suspend or revoke a certificate or license?

The ability of the fire marshal to suspend or revoke a certificate or license is typically guided by regulatory processes designed to ensure due diligence and fairness. The correct choice indicates that action can indeed be taken after an investigation has been conducted, which is a crucial component in regulatory enforcement. This approach allows the fire marshal to gather the necessary facts and context about any potential violations before making a decision.

The mention of a notice period underscores that due process is a priority in these proceedings. It ensures that individuals or entities potentially facing sanctions have a chance to understand the issues being raised and to respond appropriately. This not only upholds fairness but also reinforces the importance of accountability within the fire safety industry.

In contrast, the other options suggest different processes that may not align with the required legal or procedural standards. For instance, proposing action only after a written warning might not always be sufficient if the violations are deemed serious enough, and stating that action can be taken for any failure to comply might overstate the fire marshal's authority without due process considerations. Additionally, suggesting that a public safety risk is the sole criterion overlooks the structured investigation process that must precede any enforcement action. Thus, choice C reflects a balanced and procedural approach to regulating fire safety certifications and licenses.