Two years ago a group of around 100 villagers from...the north and northeast...arrived outside the Thai Administrative Court in Bangkok…Among the group were 37 villagers...[who filed] a lawsuit against the Xayaburi Dam – the first dam planned on the Mekong mainstream…[T]hese villagers will be back in court to hear a ruling from the Supreme Administrative Court…whether or not to accept the lawsuit…The lawsuit – filed against five government bodies, including…the Electricity Generating Authority of Thailand (EGAT)…[which] is set to buy 95% of the power…claims that approval of the project’s Power Purchase Agreement (PPA) is illegal under both the Thai Constitution and the 1995 Mekong Agreement. The PPA made between EGAT and the Xayaburi Power Company Limited, was approved without an assessment of the project’s environmental and health impacts and without consultations in Thailand…[T]he Administrative Court…[denied] jurisdiction to hear the communities’ case…[T]he communities…filed a formal appeal…If the lawsuit is accepted it would be within the Court’s power to suspend the PPA until transboundary impact studies are carried out and consultations are held in Thailand...