Legal provisions for EIA exist in Yemen since 1995, when the Environmental Protection Law was issued. EIA remained voluntary until 2005 though, when the Environmental Protection Authority (EPA) got a legal mandate for some EIA-related procedures. Since 2006, the EPA has been preparing a new Environmental Protection Law and also EIA guidelines are under development.
Kolhoff et al., 2013. An analysis framework for characterizing and explaining development of EIA legislation in developing countries - Illustrated for Georgia, Ghana and Yemen. Environmental Impact Assessment Review 38 (2013) 1-15.