The By-Laws establishing what is now the Masonry Institute of Southern Illinois on October 18, 1978 state the purposes for which the Association is formed are to promote the general and economic welfare of its members and to improve the business of masonry contracting by:
- Fostering and encouraging a spirit of friendship and cooperation among its members, and with their respective employees and others engaged in similar and allied trades.
- Providing for the mutual exchange of practical and educational data between its members, and creating and encouraging programs to protect the health and safety of their employees.
- Establishing and maintaining a high standard of business ethics and conduct in dealings among its members, and with others engaged in similar or allied trades.
- Preventing dishonest and fraudulent practices in the business of masonry contracting.
- Aiding, assisting and cooperating with persons engaged in similar or allied trades to establish industrial efficiency; to contribute to a better public understanding and acceptance of the purposes and functions of persons engaged in the business of masonry contracting.
- Recommending, by all legal means, any and all legislation which will benefit and improve the business of masonry contracting.