We often had the topics of Events and Landmarks, and how they could be expanded by further sideways non-cards. You know, things that just change the rules, without resorting to the buying mechanic, or just caring about points. Today I decided to give it a try myself.
The first issue with a thing like this is that they are hard to remember. You can check Events during your buy phase, and Landmarks are about VP, so they will catch your attention automatically. They also have a special color. So I thought, if Events are white and rather simple, like the default Actions cards, and Landmarks are green and about points, like VP-cards, then this new thing about effects that can happen at any time should maybe also take the color scheme of cards that can trigger at any time: So, reaction-blue.
As a theme, I went with an old naming idea LastFootnote had: Edicts. He also named most of them after expressions from politics, and I felt that fit, so I kept it.
The following are more exemplary than anything. Please note that I intentionally made it so that the effects are all triggered by a player wanting it - this way, if you forget an Edict, you're not cheating. Also, I tried to make sure none of these can trivially be implemented as an Event or Landmark...