I had contacted GMEI support previously and this is what they said:
The form is only to be required at time of Registration or Renewal and does not have to be filed retroactively, hence if you are not scheduled to renew anytime soon no action is required on your end at this point.
If you are renewing soon here's what you need to do:
1) Download the form via the following hyperlink: Authorization Form
https://www.gmeiutility.org/Attachments/BEDBV_LEI_Authorization_Form.docx#2) Print and complete the required data on the form, either as Primary Party (a representative of the Legal Entity or family of Entities) or Third Party (acting on behalf of the Legal Entity)
3) If you are establishing Requesting Authority for multiple Legal Entities, please list the entities separately.
4) Provide the contact information for the authorized person and sign the document.
5) Return the document in PDF or .JPG format to: Onboarding@gmeiutility.org who will manage this process.