Where an elementary school district and a high school district with a combined average daily attendance of 300,000 or more are governed by the same governing board, and the pupils in grades seven and eight in the districts are in attendance at high schools maintained by the high school district, the governing board, by resolution filed with the county auditor, may provide that the bond issuance limitations determined under Section 15102 shall be adjusted by reducing the bond issuance limitation of the elementary school district by 1 percent of its total and by augmenting the bond issuance limitation for the high school district by the amount by which that of the elementary district was reduced.