(2) If the county advances taxes under this subsection, before December 1 of each year, it may deduct from the levy the three percent discount which would have been given by the district had all of the taxes been paid by November 15 and turned over to the district on or before December 1 of each year. If the payment is made after December 1, no discount shall be taken by the county. [1965 c.492 §4; 1969 c.595 §8]