(2) The agencies shall designate in their respective rules which employees shall be officers, and shall require all officers to take and subscribe to an oath of office and, if the circumstances require it, to furnish bonds. [Amended by 1969 c.597 §36; 1987 c.320 §122; 1999 c.59 §35; 2001 c.900 §37; 2009 c.595 §136; 2013 c.36 §44]