There might be a section called Officers of Judiciary. Maybe with both establish where the oaths are required to be published. It would make sense that county judges are required to file at the county clerk and recorder while district judges have to file with the Secretary of State or Protonotary of the Commonwealth.
Look at the Statutes about Courts. Form of Oath should be specified. Also the Secretary of State should have the Oath of Office form in conformity with statute online.
You probably want to be looking at current law and constitutions. But if you cannot find your way above then look in the older renditions and find out how, when and especially why it was written out or otherwise obscured.