What would SCMMA become under the Society structure?

Under the Society structure, SCMMA would become its own Local. Each Society Local has the right to negotiate and manage its operations, in accordance with the Constitution, Bylaws, policies and procedures to best serve their members. In doing so, each Local acts fairly autonomously, with the common objective to increase benefits, opportunities and rights for the union membership as a whole.

Society Locals are assigned a Labour Relations Staff Officer who is a specialist in supporting and guiding employer interactions, agreement negotiations, and grievance handling. The Society also provides a comprehensive training program for Local elected representatives, including bargaining teams. Often Locals will work with the Society Researcher, Organizer, external relations, and communications staff on specific issues or to support their negotiations. However, it is the Locals and their elected representatives who hold decision-making responsibilities.

Check out the complete doc: Introduction to the Society of United Professionals