The ISO 17442 standard defines the minimum reference data requirements.

The development of the actual data formats for the LEI system is, however, in the hands of LEI ROC (Regulatory Oversight Committee), with its subsequent implementation conducted by GLEIF (click here for information about the organizational structure of the Global LEI System).

There are two levels of reference data currently available:

• Level 1 Data – “Who is Who” reference data
• Level 2 Data – “Who owns Whom” reference data