Superstream is a new data and payment standard aimed at enhancing the efficiency of the superannuation system, requiring electronic submission of data and payments linked with a unique reference number. Employers with 20 or more employees must comply by July 1, 2014, while those with 19 or fewer must comply by July 1, 2015. The standard mandates specific data fields to be provided with payments and responses to fund requests within 10 business days, with penalties for non-compliance.