Final answer:
The licensee's supervisor or the insurance company/brokerage notifies the DOI when a 1st year licensee completes the 12-month supervision, often including the submission of verification documentation.
Step-by-step explanation:
The individual or entity responsible for notifying the Department of Insurance (DOI) when a 1st year licensee completes the required 12-month supervision would typically be the licensee's supervisor or the insurance company or brokerage which provided the supervision. This notification often includes submitting documentation that verifies the completion of supervision requirements according to state regulations, ensuring the licensee is now eligible to conduct duties unsupervised. The process may vary by state, but it is crucial to adhere to the specific requirements of the state DOI to maintain the license's validity.