Detailed information on the Legal Entity Identifier (LEI) can be found on the Global Legal Entity Identifier Foundation (GLEIF) website:
and in the GLEIF FAQs:
What is the Legal Entity Identifier (LEI)? What are the advantages of the LEI? Do I need an LEI and can I apply for one from LEI Switzerland? How much does an LEI cost and how can I pay? How do I apply for one or more LEIs? What documents and credentials do I have to submit with the LEI application? What information is published about the company? How long will it take before I receive my LEI? What information is checked prior to the issue of an LEI? My business is domiciled in Switzerland but is also active abroad. Do I need another LEI from the LEI issuer abroad? When does my LEI expire and how can I renew it? My data are (no longer) correct. What should I do? I have discovered an error in another LEI. What should I do? Where can I find the LEI data of my business partners and other market participants? What do the acronyms FSB, ROC, GLEIF, GLEIS, LOU mean?