13. A common contribution is essential for the maintenance of the public forces and for the cost of administration. This should be equitably distributed among all the citizens in proportion to their means.

The statement you've provided seems to be discussing the principles of taxation and public finance. It emphasizes the importance of a common contribution (likely referring to taxes) for maintaining public services and administration. The key points extracted from the statement are: 1. **Common Contribution**: This refers to the taxes or financial contributions made by citizens to support public forces and administration. 2. **Maintenance of Public Forces**: This likely refers to funding for law enforcement, military, and other public safety services. 3. **Cost of Administration**: This pertains to the expenses associated with running government operations and services. 4. **Equitable Distribution**: The statement advocates for fairness in how these contributions are collected. 5. **Proportional to Means**: This suggests that the amount each citizen contributes should be based on their financial capacity or income. If you have a specific question or need further analysis or a solution related to this topic, please provide more details!