All rights acquired prior to April 29, 1963, in connection with the financing of any project at any institution are hereby preserved and all acts and proceedings taken by the board preliminary to and in connection with the authorization and issuance of any notes or other obligations for any project issued and outstanding prior to April 29, 1963, are hereby legalized, validated, and confirmed and said 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.