There shall be no discrimination in respect to interest on investments made or to be made in any of the following public buildings owned, managed, and controlled wholly by the state of North Dakota:
1. The capitol building.
2. The university or other educational buildings.
3. The state mill and elevator, Bank of North Dakota, or other industrial buildings.
4. The state hospital or other charitable institutions.
5. The memorial building, bridges, or highways, or any other public building or structure.