The Bonds shall be sold to the highest and best bidders, for not less than their par value, upon sealed bids, from time to time, as the Governor shall direct. The Governor may reserve the right to reject any and all bids. The Secretary of State shall, from time to time, as the Bonds are to be sold, advertise in at least two daily newspapers, one of which is published in the City of Springfield and one in the City of Chicago, for proposals to purchase the Bonds. Each of such advertisements for proposals shall be published once at least 10 days prior to the date of the opening of the bids. All or any part of the Bonds may be made registerable as to principal with the State Treasurer. The Bonds may be callable as determined by the Governor; provided however, that the State shall not pay a premium of more than 3% of the principal of any Bonds so called. The Bonds shall be deposited with the State Treasurer, and upon delivery of the Bonds to the purchaser, the proceeds of the Bonds shall be paid into the State Treasury. The proceeds of the Transportation Bonds, Series A shall be kept in a separate fund known as the “Transportation Bond, Series A Fund”, which separate fund is hereby created. The proceeds of the Transportation Bonds, Series B shall be kept in a separate fund known as the “Transportation Bond, Series B Fund”, which separate fund is hereby created.