Notwithstanding any other law, when any school district in the County of Santa Barbara is in any manner merged with one or more school districts so as to form a single district pursuant to subdivision (b) of Section 35542 of the Education Code, the district so formed may continue to impose any qualified special taxes imposed in any former district as defined by Section 35516 of the Education Code, provided that the revenues derived from those qualified special taxes remain segregated on a geographical basis conforming to the former boundaries of the school districts prior to unification.