Hiring closely related individuals to work in the same organization can lead to troublesome workplace situations. A policy governing nepotism can prevent most problems.

An applicant who is closely related to an employee is not normally eligible for employment in a position that would result in one family member directly reporting to or reviewing the performance of another. Exceptions require the advance approval of the senior management team. "Closely related" is generally interpreted to mean spouse, life partner, parents, children, siblings, grandparents, in-laws, relatives through marriage, or members of the same household. Employees in a supervisory relationship who become related while working at the NPC must end the supervisory relationship by resigning or transferring to an open position in another department.