No allowance of severance aid shall be made as provided in Section 41960 unless the total assessed value of taxable real property within the school district is reduced by one-half of one (0.5) percent or more during a fiscal year by reason of acquisitions giving rise to severance aid as provided in Section 41960. In determining whether or not the value of the acquisitions is equal to one-half of one (0.5) percent or more of the value of taxable real property, all of these acquisitions made during each fiscal year shall be considered as one sum.
Ca. Educ. Code § 41963