Effective regulatory frameworks for public-private partnerships (PPPs) in infrastructure development have become an important comparative advantage for countries’ ability to attract international investors in infrastructure services. According to estimates MENA governments plan to spend around USD 100 billion by 2015 only in the water sector.1 Given these estimates, regulators will have to use available resources including technical and material implementation capacity and private investment prepared to engage in long term risks in the most efficient way. This provides a strong argument for the provision of a transparent and predictable regulatory environment to make PPPs work without wasting resources. Experience from OECD and non-OECD countries laid out in the 2006 OECD Policy Framework for Investment and the 2007 OECD Principles for Private Sector Participation in Infrastructure underscores the fact that private investors’ interest in PPP projects requires not only clear guidance on financial arrangements of a potential project, but also a reliable political, administrative, and regulatory framework to be in place.