Upon appropriating any such funds in aid of any work, the legislative body by resolution shall direct the street superintendent to apportion the sum thus appropriated pro rata between all properties assessed upon the original assessment or any reassessment made therefor, whichever is the latest in point of time. Such sum shall be apportioned in the same ratio that the original assessments bore to the total assessment against all properties assessed.
Ca. Sts. and High. Code § 5552