This page has links to the Toastmasters International Policies and Procedures, and Club Constitution and Bylaws.
Toastmasters International has a Policies and Procedures Manual which governs the operation of the organisation.
Clubs have a standard Constitution, and customised Bylaws for their general operating procedures.
There are also a number of other documents and official information about the operation of Toastmasters, including manuals, handbooks, and guidelines. You can find these on the Toastmasters International website.