We tried using EyeCite to a corpus of statutes, regulations, and court opinions. It found some but not all citations. It performed better with citations to court opinions and struggled the most recognizing citations to states and regulations.
Example
Democracy N.C. v. N.C. State Bd. of Elections
https://electionlawnavigator.org/state/north-carolina/cases/472192329-democracy-n-c-v-n-c-state-bd-of-elections/

We also ran into some issues concerning "Id." In a case such as this screenshot, where Eyecite missed one, the Id would point to the wrong thing.

We tried using EyeCite to a corpus of statutes, regulations, and court opinions. It found some but not all citations. It performed better with citations to court opinions and struggled the most recognizing citations to states and regulations.
Example

Democracy N.C. v. N.C. State Bd. of Elections
https://electionlawnavigator.org/state/north-carolina/cases/472192329-democracy-n-c-v-n-c-state-bd-of-elections/
We also ran into some issues concerning "Id." In a case such as this screenshot, where Eyecite missed one, the Id would point to the wrong thing.