traderule

noun
UK /ˈtreɪd.ruːl/
US /ˈtreɪd.ruːl/

A trade rule is a rule that tells people how to buy and sell things.

The shop follows a trade rule that says all prices must be shown clearly.


OTHER MEANINGS

2. A rule in a game about swapping things with other players.

In the trading card game, the trade rule says you can only swap one card at a time.

3. A company's own rule for how it buys and sells goods.

The store's trade rule requires a receipt for every return.

4. A law that controls buying and selling between countries.

The new trade rule makes it easier to sell toys to other countries.