Categories Laws and Regulations The system of National Water Efficiency and Conservation Center Post author By Decree Post date 2 February 2021 You do not have access to view this content. Please note that the login details of Decree Oman are not linked to Decree Saudi. Username or E-mail Password Remember Me Forgot Password ← Council of Ministers: Decision 337 Approving the Governance Regulation for the Purebred Arabian Horses → Council of Ministers: Decision 336 Establishing the National Water Efficiency and Conservation Center