§1. In every curia a chancellor is to be appointed whose principal function, unless particular law establishes otherwise, is to take care that acts of the curia are gathered, arranged, and safeguarded in the archive of the curia.
§2. If it seems necessary, the chancellor can be given an assistant whose title is to be vice-chancellor.
§3. By reason of being chancellor and vice-chancellor they are notaries and secretaries of the curia.
Source: Code of Canon Law (Vatican.va)