The provided rules context does not address what happens when the Imperium Row runs out of cards to refill. The rules only mention the initial setup where five cards are dealt face up to form the Imperium Row from the shuffled Imperium Deck, but don't specify the procedure when the deck is depleted during gameplay.

The provided rules context does not clearly address whether multiple agents can be placed on the same board space during a turn. The rules mention that each player has 3 agents and describe various setup components, but don't include the specific worker placement restrictions for board spaces.

The provided rules context does not clearly address whether you can exceed influence requirements when placing agents on board spaces. The rules context focuses on setup and components but doesn't include the specific mechanics for agent placement and influence requirements.

The provided rules context doesn't clearly answer whether sandworms always appear when gaining spice from the desert. The rules mention that "spice harvesters must flee when they approach" and reference sandworms in relation to desert spice harvesting, but don't specify the exact conditions or frequency of sandworm appearances when harvesting spice.

The provided rules context does not clearly address when Intrigue cards can be played or whether they can be used during other players' turns. The rules mention that Intrigue cards exist and should be shuffled into a deck during setup, but don't specify the timing restrictions for playing them.

The provided rules context doesn't clearly address what happens when you can't afford to pay the cost of a board space or card effect. The rules shown focus on setup and game components but don't include the specific mechanics for handling insufficient resources to pay costs.

The provided rules context doesn't contain information about when you draw back up to 5 cards after playing cards. The rules excerpt focuses on setup components and thematic background, but doesn't cover the hand management mechanics you're asking about. You'll need to check the gameplay section of the rulebook for this information.

The provided rules context does not contain specific information about whether players can choose not to use their Leader's special abilities when they would be disadvantageous. The rules mention that Leaders have different complexity levels indicated by icons, but don't address the optional or mandatory nature of their abilities.