On or before the first day of December of each fiscal year, the Director of General Services shall determine for each grade level and certify to the Controller the eligible bonded debt service for the district, as follows: (

a) He or she shall determine the amount of the bonded indebtedness that was incurred by the district for each grade level, when bonds were issued and sold for purposes of more than one grade level.

When one or more additional apportionments have been made to a grade level of a school district, conditioned upon the issuance and sale of additional bonds of the district or upon the requirement that the proceeds of bonds issued and sold be contributed for the purposes of the application for which the apportionment is made, the Director of General Services shall determine and include in the eligible bonded debt service and in his certificate the amount raised and to be raised by the district during the current fiscal year for the payment of principal and interest on that portion of the additional bonded indebtedness of the district that was incurred for each such grade level as a condition to receiving the additional apportionment or which was incurred for bonds issued and sold, the proceeds of which were required to be contributed for purposes for which the apportionment was made. (

b) If the Director of General Services determines in any fiscal year that the amount certified to the Controller as the eligible bonded debt service during the last preceding fiscal year is more than the amount actually raised by the district for the repayment of principal and interest of the bonded indebtedness referred to in subdivision (

d) of

Section and subdivision (

a) of this section, then the Director of General Services shall subtract from the amount determined as the eligible bonded debt service for the current fiscal year an amount equal to the difference between the amount actually raised by the district during the preceding fiscal year for the repayment of such bonded indebtedness and the amount so certified by the Director of General Services. (

c) If the Director of General Services determines in any fiscal year that the amount certified to the Controller as the eligible bonded debt service during the last preceding fiscal year is less than the amount actually raised by the district for the repayment of principal and interest of the bonded indebtedness referred to in subdivision (

d) of

Section and subdivision (

a) of this section, then the Director of General Services shall add to the amount determined as the eligible bonded debt service for the current fiscal year an amount equal to the difference between the amount actually raised by the district during the preceding fiscal year for the repayment of the bonded indebtedness and the amount so certified by the Director of General Services. (

d) If an apportionment has been made to a district for a grade level for which the district also received an apportionment pursuant to

Chapter 4 (commencing with

Section 15700) of this part, the Controller shall determine the amount of the annual repayment, if any, due from the district during the next succeeding fiscal year for the grade level as required by

Chapter 4 (commencing with

Section 15700) of this part and the amount shall be included by the Controller in the eligible bonded debt service of the district for that grade level. For an apportionment to a unified district for a grade level consisting of kindergarten, if any, and grades to 12, inclusive, for which an application for an apportionment was filed on or after the effective date of the amendment to this

section made at the session of the Legislature, if an apportionment had also been made to the district pursuant to

Chapter 4 (commencing with

Section 15700) of this part for a grade level consisting of kindergarten, if any, and grades to 6, inclusive, or to 8, inclusive, or grades to 12, inclusive, 9 to 12, inclusive, or to 10, inclusive, the Controller shall determine the amount of the annual repayment, if any, due from the district during the next succeeding fiscal year for all of the grade levels as required by

Chapter 4 (commencing with

Section 15700) and the amount shall be included by the Controller in the eligible bonded debt service of the district for the grade level consisting of kindergarten, if any, and grades to 12, inclusive.