The county treasurer shall designate on the county system each parcel sold for taxes and not redeemed, by noting on the county system the year in which it was sold. [C73, §842; C97, §1386; C24, 27, 31, 35, 39, § 7238; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81 , S81, §446.1 ; 81 Acts, ch 117, §1224 ] 91 Acts, ch 191, §58