Failure to furnish return threshold increased and lesser offence imprisonment reduced, altering penal triggers and sanctions. Amendment raises the monetary threshold for prosecutions for wilful failure to furnish specified returns, thereby limiting application of the enhanced penal provision to higher value tax evasion cases, and reduces the maximum imprisonment for the lesser offence category, shortening custodial exposure for failures beneath the increased threshold; the changes take effect from the mid 2012 implementation date specified.