a justice or judge of the United States appointed to hold office during good behavior (i) who is in regular active judicial service, or (ii) who is retired from regular active service under section 371(b) or 372(a) of title 28, United States Code, or (iii) who has resigned the judicial office under
section 371(a) of title 28 with the continued right during the remainder of his lifetime to receive the salary of the office at the time of his resignation;