gistfile1.cs

        public static void Main(string[] args)
        {
            Model.PlacementList allPlacements = Model.PlacementList.GetAll();
           
            foreach (Model.Placement p in allPlacements)
            {               
                if (p.CanBeTacitRenewed())
                {
                    Model.GripTPrincipal principal = GripTPrincipal.ForUserId(p.PlacementAST.GetPrimaryContact());
                    p.PerformTacitRenewal();
                }
            }
        }