Parliament on Thursday passed the Securities Depository Bill and is awaiting presidential assent.The law will provide legal backing to bring government instruments and shares onto an electronic system known as the Central Securities Depository CSD.Currently only government instruments including treasury bills and bonds are on the CSD.Shareholders will therefore no longer need to keep share certificates as evidence of owning shares as their records will also be kept on the Central Securities Depository.The move to bring listed shares onto the CSD has been one of the major programmes of the Ghana stock Exchange since last year.