Congolese, Burundian, and Rwandan land rights are autonomous rights of sovereign states. Their integration into a regional community is the free will of states wishing to work together towards a common goal. This is the case for these three countries, which have voluntarily agreed to join sub-regional organizations such as the Economic Community of the Great Lakes Countries (CEPGL) and the East African Community (EAC). How can these legal systems be made more integral to the growth of private community investment in member countries? Through the use of legal and comparative methods, supported by documentary and interview techniques, we have arrived at mechanisms that are more attractive to investors and more integrationist of these three legal systems in these two sub-regional organizations: "CEPGL" and "EAC".