The certificate of purchase delivered by the tax collector to the purchaser at such sale or to the state in case the state is the purchaser is assignable in writing or by endorsement, and if the state is the purchaser such assignment shall be made by the Land Commissioner upon the payment of the amount bid by the state, with interest thereon at the rate of 12 percent per annum from the date of sale to the date of assignment, plus all taxes due on said lands since the date of sale, with interest thereon at 12 percent from date of maturity. Such assignment shall vest in the assignee and his legal representatives all the right and title of the original purchaser or of the state in case the state is a purchaser.

Upon such assignment it shall be the duty of the assignee or his legal representatives to assess such property as from the date of such assignment.

Should such assignment be made after the third Monday in January, the assignee shall be allowed 30 days within which to assess such property before any penalties for such failure shall accrue.