CA SB1360

Requires initiative, referendum, and recall petitions to include disclosure language instructing voters to sign only after viewing information about top contributors to the measure, with specific formatting and placement requirements.

Modifies political advertisement disclosure requirements to specify the form, content, and presentation of "top contributors" disclosures across different media types (video, print, online, social media, radio, etc.).

Requires committees paying for petition circulation to create an "Official Top Funders" sheet listing the top three contributors, with detailed formatting specifications for font size, type, layout, and background.

Allows local jurisdictions to merge substantially similar disclosure statements required by local ordinance with state-mandated disclosures into a single statement.

Declares that violations of the disclosure requirements are violations of the Political Reform Act of 1974; specifies no state reimbursement is required as costs relate to crime definition changes.