Travail personnel. References:

• https://www.mapresearch.org/democracy-maps/absentee_requirements
• https://ballotpedia.org/All-mail_voting
• https://ballotpedia.org/Absentee/mail-in_voting
• Washington, D.C.: https://www.dcboe.org/Voters/Casting-Your-Vote/Request-an-Absentee-Ballot

Timeshifter. Using this map as a template: File:ACA Medicaid expansion.svg. See multiple authors there. User:cmglee is the main template author. The template map, and this map, have a notated user-editable section at the top of the SVG code that can be edited with any text editor. Right-click the SVG file and click "Open with". Open with Notepad, Notepad++, etc.. Edit and save it as SVG. It will save it as SVG automatically. Click the SVG file and your browser will show the map. Or do continuous edits and reload the map page in your browser after various edits. For alphabetical list of 2-letter state abbreviations go here:

• List of U.S. state and territory abbreviations

For more help go here:

• Commons:Map resources#SVG file checkers
• File talk:ACA Medicaid expansion.svg