Final answer:
A state regulatory violation by an insurance agent is typically not a federal offense; it is handled at the state level unless it involves federal statutes or crosses state lines.
Step-by-step explanation:
The acts listed, such as fraud, embezzlement, and unauthorized disclosure, are all offenses that can be prosecuted under federal law when they involve federal insurance programs, interstate commerce, or other federal interests. However, if an insurance agent were to violate a state regulation, this would typically be handled at the state level, not as a federal offense, unless the violation also contravenes federal laws. The federal government generally does not prosecute state regulatory violations.
Given the context provided, the act that is not a federal offense is d) State regulatory violation. Each state has its own set of insurance regulations, and violating these would be considered a state offense rather than a federal one, unless it specifically involves federal statutes or crosses state lines.