The school board of any district, with the exception of the Board of Public Education in Wilmington, shall sell any bonds to be issued pursuant to the authority contained in this chapter or pursuant to any other provision of law to the State at private sale. The State may require that the validity of the bonds be approved by the Attorney General or the Attorney General's designate. The board shall cause a complete record of the proceedings taken in relation to the issuance of the bonds to be made and kept with the other records of the board, and shall cause a duplicate of such record to be made and filed with the Department of Education.