E911 and the LIS: WTF!?!?!?!?!

Do you struggle with the requirements for E911 implementation in the US and Canada? Still trying to figure out RAY BAUM and Kari's Law in the US or Telecom Decision CRTC 2022-265 and its associated decisions in Canada? 

What is a Dispatchable Location? What is ANI/ALI? What is/are ELINs, BSSIDs, Notification policies, ERS/TRS providers? How do you implement E911 in a multi-vendor environment, call center, or hybrid VoIP/Analog environment? Who's responsibility is it to manage this data?

Let's clear out the fog and walk through how this solutions work in the lead up to NG-911 and potential implementation in Europe.