Section 51405 Of Article 6. Supplemental Assessments From California Water Code >> Division 15. >> Part 7. >> Chapter 2. >> Article 6.

. When a supplemental assessment has been levied, approved, and filed, it shall be called for immediate payment and shall become delinquent by declaration made in the resolution at a specified date at least five days prior to the date fixed for the sale of the refunding bonds.