No right or obligation accrued by the formation, organization, reorganization or operation of a sanitary district pursuant to the provisions of Chapter 161 of the Statutes of 1891 or the provisions of the Sanitary District Act of 1919 is affected by the repeal of those acts and any district so organized or reorganized may continue in existence and subject to the act under which it was organized or reorganized or may reorganize pursuant to this part.