SUPPLEMENT TO PRELIMINARY LIMITED OFFERING MEMORANDUM relating to $31,675,000∗ CALIFORNIA SCHOOL FINANCE AUTHORITY CHARTER SCHOOL REVENUE BONDS (ARTS IN ACTION CHARTER SCHOOLS – OBLIGATED GROUP) SERIES 2020A (TAX-EXEMPT) | $995,000∗ CALIFORNIA SCHOOL FINANCE AUTHORITY CHARTER SCHOOL REVENUE BONDS (ARTS IN ACTION CHARTER SCHOOLS – OBLIGATED GROUP) SERIES 2020B (TAXABLE) PLOM POSTED 12-29-19