An act to amend Section 17912 of the Business and Professions Code, to amend Sections 395.2 and 416.40 of the Code of Civil Procedure, to amend Sections 174.5, 5063.5, 12242.5, 15800, and 21200 of, to amend the heading of Part 5 (commencing with Section 24000) of Title 3 of, to add Sections 16309 and 16310 to, to add Part 1 (commencing with Section 18000) to Title 3 of, and to add Chapter 1 (commencing with Section 18605) to Part 2 of Title 3 of, and to repeal Sections 24000, 24001, 24002, 24003, 24004, 24005, 24006, and 24007 of, and to repeal Part 1 (commencing with Section 20000) of, and Chapter 1 (commencing with Section 21000) and Chapter 2 (commencing with Section 21100) of Part 2 of, Title 3 of, the Corporations Code, and to amend Section 50089 of the Government Code, relating to unincorporated associations.