1. Short title, extent and commencement.

(a) render recoverable any sum which during the continuation thereof was irrecoverable or affect the right of a tenant to recover any sum which during the continuance of the Act was recoverable by him thereunder; or
(b) affect any liability incurred under that Act or any punishment incurred in respect of any contravention of that Act or any order made thereunder; or
(c) affect any investigation or legal proceeding in respect of any such liability or punishment as aforesaid,