(A) The superintendent of financial institutions may serve any notice that the superintendent is required or authorized to give and any subpoena or order that the superintendent is required or authorized to issue pursuant to sections 1315.01 to 1315.18 of the Revised Code, at the sole discretion of the superintendent, by any of the following means:

1. (1) In person by the superintendent or an employee or agent of the division of financial institutions;
2. (2) By regular mail;
3. (3) By registered or certified mail;
4. (4) By private carrier;
5. (5) By any other means permitted by the Rules of Civil Procedure for service of process;
6. (6) By any other manner the superintendent provides, by rule or otherwise, that is reasonably calculated to give notice, including by publication.