- Between advisor and advisee forever.
- Between family members forever.
- Between people who have collaborated in the last 4 years. This collaboration can consist of a joint research or development project, a joint paper, or when there is direct funding from the potential reviewer (as opposed to company funding) to an author of the paper. Co-participation in professional activities, such as tutorials or studies, is not cause for conflict. When in doubt, the author should check with the PC chairs.
- Between people from same institution or who were in the same institution in the last 4 years.
- Between people whose relationship prevents the reviewer from being objective in his/her assessment.