This study reviews the concept of stopping the implementation of administrative decisions, with an indication of the effects of the endowment in the event of a ruling by the administrative judiciary. Then the administration focuses on the condition of seriousness, which is intended to give precedence to the judge, through the apparent papers submitted in the request for stay of execution, and through the reasons presented by the challenger to the decision that the court's greatest tendency is to the illegality of the administrative decision when deciding on the annulment lawsuit With an explanation of the means by which the administrative judge can verify the availability of the seriousness condition, which is to examine the evidence submitted by the appellant to the decision to request a stay of execution, as well as the administration's failure to respond to the evidence and seek the assistance of experts' work in that, and in the end the study reviews the discretionary space that the administrative judge enjoys When examining the condition of seriousness by informing him of the appearance of the application papers and not to be exposed to the origin of the right in the cancellation lawsuit. The study has reached several important results and proposals that contribute to enriching administrative legislation and judicial jurisprudence in the future, where the Omani judiciary can consider finding new and advanced ideas to stop the implementation of administrative decisions such as conditional and partial stays or linking the submission of a request for a stay of execution to a financial guarantee while giving the Omani administrative judge sufficient space. Through it, he can estimate the condition of seriousness, but in a balanced manner consistent with the facts presented to him, without limiting the judge's discretion.