(c) Prohibited relationships and associations. Prohibited relationships and associations include the following:
- (1) Immediate family members, including parents and children, whether related by blood or marriage;
- (2) Close relatives, including grandmother, grandfather, aunt, uncle, sister, brother, niece, nephew, granddaughter, grandson, or first cousin, whether related by blood or marriage;
- (3) Any household residents;
- (4) Immediate working relationships, including coworkers in the same office, subordinates, and immediate supervisors; and
- (5) Close business associations, including business partnerships, joint ventures, or closely held corporations.