Toastmasters International has Policies and Protocols which governs the operation of the organisation.
View Policies and Protocols (Toastmasters International Governing Resource Documents webpage)
Clubs have a standard Constitution, and customised Options for their general operating procedures.
View the Standard Club Constitution and Club Options (refer to pages 117-139 of the Policies and Protocols Document from Toastmasters International website)
There are also a number of other documents and official information about the operation of Toastmasters, including manuals, handbooks, and guidelines available on the Toastmasters International website. The full documentation is currently available for download at https://www.toastmasters.org/resources/governing-documents