A copy of all contract sales of port district property shall be filed with the county assessor within thirty days after the first payment is received by the port. The assessor shall place such property on the tax rolls of the county and the purchaser of such property shall become liable for all levies and assessments against such property. The port shall not be liable for any taxes or assessments, but if any outstanding taxes are not paid the property may be sold by the county as with other property with delinquent taxes due. Any amounts accruing from such a sale by the county, not required to pay outstanding and delinquent taxes or assessments and foreclosure costs, shall be paid to the port district.