Section 8768 Of Part 11.1. Alternative Procedure For Collecting Assessments And Advance Retirement Of Bonds From California Streets And Highways Code >> Division 10. >> Part 11.1.

. The treasurer shall select bonds for retirement in such a way that the ratio of outstanding bonds to issued bonds shall be approximately the same in each annual series insofar as possible. Within each annual series, bonds shall be selected for retirement by lot.