Not everyone needs these rules. For those GMs who have players comfortable with adding NPCs, places and events on the fly and/or GMs who aren't looking to give players that kind of control over there world, this rules set won't mean much. It is oriented towards GMs that either have players who are not comfortable with suggesting new parts to the world or who are looking to give players rules for influencing the narrative.
The rules that I propose here will cover how players can declare that they would like to add a NPC, place, or event during play. Something to remember when using these rules is that the GM should work with the players when they use these rules to create something in the world to make sure that what the players wish to add fits within the setting.
A declaration is a proposition for the addition of a NPC, place or event within the setting. When a player makes a declaration, they first state what they want to add to the setting, which the GM then works with the player to make the idea work with the setting. After the player and GM have worked to make the idea fit the setting, the GM can accept or deny the idea. At any point the GM or player can completely revoke the declaration.
In this set of rules there is a currency for players to use to make a declaration. This currency is referred to as a story point, which is spent when a player wishes to make a declaration. If the declaration is denied or revoked by either the player or the GM, the player is returned the spent story point.
There are several ways that a GM can give players story points depending on their preference and if they want to use the ability to manipulate the setting as a reward. For those who are looking to offer their players the ability to change the setting, offering the use 2 to 4 story points a session encourages story points to be more readily used. For GMs looking to turn story points into rewards, offer them for doing certain activities, like awesome role play or completing side quests or other behaviors the GM wishes to encourage.
If you, as a GM, offer story points per session, they expire at the end of the session. Story points given as rewards shouldn't expire. If you wish to provide a mix of the two, try offering 1 free use of a story point every session with rewarded story points that players can save for use in later sessions.