Sacramento -- Secretary of State Kevin Shelley has moved his resignation date from Tuesday to Friday, citing "administrative convenience,'' according to his resignation letter. Shelley, who was mired in ethics scandals and the subject of multiple investigations into his fund raising and his handling of federal voting act money, announced Feb. 3 that he would step down from the office effective Tuesday. Neither the secretary of state's office nor the governor's office could provide more information Friday about why the resignation date had changed.