CA ACA4

Lowers voter approval threshold from two-thirds to 55% for cities, counties, and city-counties to issue general obligation bonds for public infrastructure or affordable housing projects.

Allows special taxes for public infrastructure or affordable housing to be approved by 55% of voters instead of two-thirds, provided the measure includes specified accountability requirements.

Requires accountability measures including: list of specific projects, annual independent audits, public posting of audits, and a citizens' oversight committee to ensure funds are used only for approved purposes.

Defines "public infrastructure" to include water systems, sewer, wastewater treatment, sea level rise protection, parks, transit, flood control, broadband expansion, and hospital construction.

Defines "affordable housing" to include workforce housing affordable to households earning up to 150% of countywide median income and housing for lower, low-, and very low-income households as defined by state law.