The superintendent of streets shall, upon the entering of a decree of court directing a reassessment or upon the making of an order by the legislative body directing a reassessment, proceed to make a reassessment in the following manner:
The benefits derived, or to be derived, by each of the lots or parcels of land from the work estimated as of the date of the filing in the clerk's office of the original assessment shall first be listed. Then there shall be added thereto interest thereon from 30 days after the date of such filing of the original assessment at the rate of 7 percent per annum, and the total sum shall constitute and be the amount of the proposed several assessments in such reassessment. The total of such reassessment, however, exclusive of interest, shall not exceed the cost and expenses of the work.
In the event such reassessment is not confirmed within seven months of the date of filing in the clerk's office of the original assessment, the legislative body shall pay from its general funds the 7 percent interest added to the cost and expenses of the work in accordance with this section, plus the incidental expenses of such reassessment in the event that a reassessment is made.
Ca. Sts. and High. Code § 5503