Assembly without approval cannot be held at all.
Senior Minister Security Cluster Datuk Seri Ismail Sabri Yaakob said roadblocks this time would be more stringent, with police personnel assisted by members of the armed forces to ensure compliance.
A check by Bernama found that traffic flow was smooth on major roads, especially in the state capitals, which were congested in the morning.
Melaka police chief Datuk Abdul Majid Mohd Ali said 10 roadblocks were mounted in the district of Alor Gajah, Melaka Tengah eight and Jasin seven , involving 700 police and military officers and personnel in rotation.
He said control at the state border would also be intensified, with roadblocks expected at over 20 areas.
Anyone with enquiries or information can call the Kuala Lumpur police hotline at 03-2115 9999 or the nearest police station.