The several departments, institutions, agencies and commissions of the State of North Carolina, acting at the suggestion of the Governor of North Carolina, with the approval of the Council of State, are hereby authorized to issue bonds of the several departments, agencies or commissions of the State, in such sum or sums, not to exceed in the aggregate two million dollars ($2,000,000), at such time or times, in such denominations as may be determined, and at such rate of interest as may be most advantageous to the several departments, institutions, agencies and commissions of the State, the? said bonds to run for a period not exceeding 30 years from date, which bonds may be sold and delivered as other like bonds of the State of North Carolina: Provided, however, that the credit of the State of North Carolina, or any of its departments, institutions, agencies or commissions, shall not be pledged further in the payment of such bonds, except with respect to the rentals, profits and proceeds received in connection with the undertaking, for which said bonds are issued, and said bonds and interest so issued shall be payable solely? out of the receipts from the undertaking for which they were issued, without further obligation on the part of the State of North Carolina, or any of its departments, institutions, agencies or commissions, provided that no State department or institution issuing any of said bonds shall be allowed to pledge any of its appropriations received from the State as security for these bonds; provided, further, that no State department, institution, agency or commission of the State shall make application for or issue any bonds, as provided in this section,? after June 1, 1941. (1935, c. 479, s. 1; Ex. Sess. 1936, c. 2, s. 1; 1937, c. 323; 1939, c. 391.)