Which requirement pertains to workers' compensation insurance for unauthorized insurers?

The requirement that pertains to workers' compensation insurance for unauthorized insurers is that evidence must be provided if issued in this state. This means that if a worker's compensation policy is issued by an unauthorized insurer, the insurer must furnish proof or documentation that verifies compliance with the regulations applicable in Louisiana. This ensures transparency and accountability, especially since unauthorized insurers are not licensed to operate in the state. The evidence serves as a safeguard for both employers and employees, confirming that the coverage meets the state's statutory requirements for workers' compensation.

The other options do not accurately reflect the specific requirements for workers' compensation insurance in this context. For instance, approval from all states involved may not be necessary for just one state’s compliance, and there is typically no specific timeframe like "issuance must be within one year" for such policies. Additionally, while licensed brokers are often involved in placing insurance, the emphasis on this particular requirement does not specifically hinge on their licensing status.