The Supreme Court on Thursday criticised authorities for poor implementation of stage IV of the Graded Response Action Plan (Grap) to check air pollution in Delhi-NCR and said the restrictions shall remain in force till the next hearing on Monday, December 2."We make it clear that all Grap-IV measures except for schools shall be continued till Monday," a division bench comprising Justices Abhay S Oka and Augustine George Masih ordered.The bench said it intends to find a long-term solution to the crisis."What we propose to do is that we will hear the case exhaustively. We want to go to the root of the matter and issue detailed instructions," Justice Oka said. "Something has to be done. Every year this problem cannot arise. This has to be taken to its logical conclusion." The court took strong note of the complete failure in stopping entry of trucks to Delhi in accordance with the restrictions in place under Grap-IV. "There is complete failure. Police were nowhere in the picture. The trucks were allowed to enter the territory," Justice Oka observed verbally after perusing a compliance report submitted to the court. "Even today, Grap-IV is not being implemented. Openly construction is going on...nobody has bothered implementation," he added. SC directed the Commission for Air Quality Management (CAQM) to hold a meeting on easing the restrictions and make suggestions about moving to Grap-III or Grap-II. It is not necessary that all measures which are provided in Grap-IV should be dispensed with and there can be a combination of measures in Grap-III and Grap-II, the bench clarified.The bench said it would examine issues like stubble burning, entry of trucks into the NCR and the implementation of firecracker ban will be examined. "We must have a machinery in place which can send us 24x7 data of stubble burning. That is the root problem you see and that is why this problem is arising...and states are very slow in taking action against farmers," Justice Oka said.The bench also questioned a notification that allows certain activities permissible under Grap-III even while Grap-IV continues to remain in operation.Additional solicitor general (ASG) Aishwarya Bhati said the notification would be withdrawn.