Final answer:
The notice of hearing for a violation of the Insurance Code must be given 30 days in advance.
Step-by-step explanation:
The subject of this question is Law as it pertains to the Insurance Code and the actions of the Commissioner.
If the Commissioner has reason to believe that a person or insurer has violated the Insurance Code, and the Commissioner may set a hearing to address the violation. In such a case, the notice of the hearing must be given 30 days in advance.
Therefore, the correct answer to the question is 3) 30 days.