N.M. Admin. Code § 16.2.14.19
The externship supervisor shall not be a member of the extern's family or a member of the extern's household. "Member of the extern's family" means a spouse, child, stepchild, grandchild, parent, grandparent, sibling, uncle, aunt, niece, or nephew, or other relative by blood, marriage, or legal process with whom the supervisor has or has had a close familial relationship. The supervisor shall not have a conflict of interest with the extern, such as a past or present familial, social, fiduciary, business, financial, or physician-patient relationship, that impairs or compromises or appears to impair or compromise the supervisor's neutrality, independence, or objectivity. If a conflict of interest arises during the supervision, the supervisor shall immediately report the conflict of interest to the board and shall cease supervision of the extern.
N.M. Admin. Code § 16.2.14.19