Any party may appear before the court in person, or by any citizen of good character, or by an attorney authorized to practice in the courts of this state; provided, however, that no person who is not a lawyer will be permitted to appear, plead, prosecute or defend any action for any party, other than himself or herself until there is on file with the Register: (1) a power of attorney signed by the party for whom he or she seeks to appear and witnessed and acknowledged before a Justice of the Peace or Notary Public, constituting said person his or her attorney to appear in the particular action; and (2) an affidavit under oath in which said person discloses (a) all of said person's misdemeanor and felony convictions (other than those in which a record of the conviction has been annull