State 413 is currently in week 23. Any thoughts (from our elder state-folk) as to why this feature..

For state immigration the rules state it should open 21 weeks after the state was formed. If it is definitely 23 weeks for your state and its not opened then either the game has been changed and the rules not updated or perhaps a glitch.

Restart your app and check that it doesn't need updating. You may need to use the option to contact support to report it as a problem or ask what might be preventing you from using the event.