SA retirement funds may soon choose to invest in infrastructure - but only state projects allowed Business Insider SA facebook (Getty) Local retirement funds may soon be allowed to invest up to 45% of their assets in infrastructure projects, according to new amendments to Regulation 28. But "infrastructure" is defined as public projects that form part of government's infrastructure strategy. This is, however, expected to include public-private partnerships. For more articles, go to www.BusinessInsider.co.za. Last week, Treasury confirmed that the official deadline for comments on the proposed amendments to Regulation 28 will now be 29 March, from the initial date of 15 March.