Assembly Bill 906 aims to strengthen regulations surrounding contributions to referendum committees by explicitly prohibiting foreign nationals from making any contributions, either directly or indirectly. The bill defines a foreign national and outlines the necessary affirmations that must be obtained from contributors, ensuring they are not foreign nationals and have not accepted significant funds from foreign sources in the past four years. Additionally, it mandates that referendum committees and independent expenditure committees attest in their reports to the Ethics Commission that they have complied with these requirements.

The bill also introduces new definitions and provisions related to "preliminary activity," which encompasses actions taken before filing a registration statement, such as preparing referendum language and conducting polls. It renumbers existing legal language and adds new sections to the statutes to clarify these regulations. Notably, it prohibits foreign nationals from participating in the decision-making processes of referendum activities, thereby reinforcing the integrity of the electoral process in Wisconsin.