Lumbridge was very badly damaged by the battle, and Duke Horacio was working on rebuilding the city. Each week he asked players to vote on how to allocate the town's emergency resources toward dealing with various situations pertaining to this goal. The Duke had a total of 160,000 coins to use for rebuilding. The situation changed periodically through the world event. Players were limited later on in the event by the amount of money they had spent. Voting was done by either speaking to Duke Horacio, using the right-click option "Manage-Crisis", or by accessing the lectern in his room.
Regardless of which option the player chose, they were rewarded with an amount of bonus experience for voting, which players could add to a skill of their choosing (e.g. "The Duke grants you an XP bonus. This will be used up as you earn XP in this skill."). Players would earn double experience as they earned experience in the skill, until the XP bonus from Duke Horacio decreased to zero. The remaining bonus experience could have been checked by hovering over the chosen skill in the skills menu.
For the first two weeks, this activity was available to both members and free players. However, free players cannot use the experience. They must become members to use the experience. Beginning in the third week, the activity was available only to members.
At the beginning of week 7, the Duke's treasury had dropped to 5,000 coins. There were choices with the cost of up to 25,000 coins, but these choices were "greyed out" and not made available to players. At the end of week 7, the chosen option had cost nothing and the treasury remained at 5,000 coins. In addition, the chosen option had no impact whatsoever in-game, i.e. the bodies were not interred in the Lumbridge Catacombs.
At the beginning of week 8, all choices had a cost value of "remainder", and the final choice, at the end of week 8, left no remaining funds in the treasury. Similar to the outcome of week 8, this choice was not reflected in-game.
The Duke's Dilemma ended at the beginning of week 9 with no new dilemmas by Duke Horacio.