22 CFR §72.19

1. (a)A consular officer is not authorized to accept appointment from any foreign state or from a court in the United States and/or to act as administrator or to assist (except as provided in §§ 72.8 to 72.30) in administration of the personal estate of a United States citizen or non-citizen national who has died, or was residing at the time of death, in his or her consular district, unless the Department has expressly authorized the appointment. The Department will authorize such an appointment only in exceptional circumstances and will require the consular officer to execute bond consistent with 22 U.S.C. 4198 and 4199.
2. (b)The Department will not authorize a consular officer to serve as an administrator unless:
   1. (1)Exercise of such responsibilities is:
      1. (i)Authorized by treaty provisions or permitted by the laws or authorities of the country where the United States citizen or national died or was domiciled at the time of death; or
      2. (ii)Permitted by established usage in that country; and
   2. (2)The decedent does not have a legal representative in the consular district.