When buying Camel cards, it is important to check which Camel cards currently have an additional tax payment. The color of the Camel card right next to the Camel deck determines which color Camel cards have an increased cost of +1 extra Goods.

Note: Even though players have to pay more for Camels with an additional tax payment, they won't score additional points from them at the end of the game.

After a Camel card is bought, all Camel cards are moved to the right so that the first space right next to the Camel deck is free and a new Camel card is revealed from the Camel deck. This means that after every Camel purchase, the color of the Camel cards which require an additional tax payment, may change.