How does one prove one’s residency to a given US state when flying to Costa Rica?


I read on :

https://www.iatatravelcentre.com/world.php (-> Costa Rica):

Costa Rica. > Published 15.10.2020.

  1. Passengers are not allowed to enter.
  • This does not apply to:

    (…)

  • residents of the following states of the United States: Arizona, California, Colorado, Connecticut, Florida, Georgia, Maine, Maryland,
    Massachusetts, Michigan, New Hampshire, New Jersey, New Mexico, New
    York, Ohio, Oregon, Pennsylvania, Rhode Island, Texas, Vermont,
    Virginia, Washington, Washington D.C. and Wyoming;

How does one prove one’s residency to a given US state when flying to Costa Rica?