Add a subrule named “Trading” to rule 2.1 “Commoner’s Economy”, as follows:

There is a page on the Wiki called “Trading Post”. That page may only be edited in manners allowed by the Ruleset.

There are 2 sections on that page: “One-Time Trades” and “Conditional Trades”. If there is no list in either section, any Commoner may create one. In such a list, each list point is a “Trade Offer”.

“Trade Offers” are defined as sentences defining the ressources asked for, defined as “Sought Ressources”, and the ressources offered, defined as “Offered Ressources”. “Trade Offers” must contain the name of the Commoner making the offer, and can also contain a “Condition”. For example, both “Roujo is offering 10 Wood and 2 Caffeine in exchange for 10 Coal and 2 Gems” and “I, Keba, am willing to trade 10 of my Gems for 20 of your Coal if I have at least 30 Gems” are valid “Trade Offers”.

Any Commoner may make a “Trade Offer” by adding it to either section as a list item in that section. Only “Trade Offers” with a “Condition” may be added to the “Conditional Trades” section.

Any Commoner may agree to a “Trade Offer” if all of the following are true:
- They have enough of the “Sought Ressources” to complete the “Trade Offer”;
- The Commoner who made the offer has enough of the “Offered Ressources” to complete the “Trade Offer”;
- If the “Trade Offer” is in the “One-Time Trades” section, the offer has not been completed yet, and;
- If the “Trade Offer” is in the “Conditional Trades” section, the “Condition” is true.
They then complete the offer by doing all of the following, in that order:
- Adding ” - Completed by [Name 2]” to the end of the “Trade Offer”, where [Name 2] is their own name;
- Reducing their “Sought Ressources” by the amounts defined in the “Trade Offer”;
- Reducing the “Offered Ressources” of the Commoner who made the “Trade Offer” by the amounts defined in that “Trade Offer”;
- Increasing their “Offered Ressources” by the amounts defined in the “Trade Offer”, and;
- Increasing the “Sought Ressources” of the Commoner who made the “Trade Offer” by the amounts defined in that “Trade Offer”;
The “Trade Offer” is then considered completed.

Any Commoner may remove a “Trade Offer” from the page if it was added by them.