All rights previously acquired in connection with the financing of any project at any institution are preserved and all acts and proceedings taken by the board preliminary to and in connection with the authorization and issuance of any previously issued and outstanding notes or other obligations for any project are hereby legalized, validated, and confirmed and the notes or obligations are hereby declared to be legal and to constitute valid and binding obligations of the board according to their terms and payable solely and only from the sources referred to in the notes or obligations.