Which of the following is a requirement for former judges under MRPC Rule 1.12?

Under MRPC Rule 1.12, a former judge must refrain from representing clients in matters in which they had personal involvement while serving in their judicial capacity. This rule is designed to maintain the integrity of the judicial process and to prevent any potential conflicts of interest that could arise from a judge transitioning back into private practice. As such, it ensures that the decisions made in their former role are not influenced by future representations or interests.

The other options do not accurately reflect the requirements imposed by MRPC Rule 1.12. For example, while the notification of past affiliations or seeking advisory opinions may be relevant in other contexts, they are not specific obligations under this particular rule for former judges. Similarly, reporting financial interests related to prior cases is not a stipulation of Rule 1.12. The primary focus of this rule is on the prohibition of representation in cases where the former judge was directly involved, thus safeguarding the fidelity of the judicial system.