The Counter-Terrorism and Security Bill has received Royal Assent from the Queen, now making it an Act. It would toughen powers to seize passports at the border from anybody suspected of travelling to Syria or Iraq for extremist activity.
Home Secretary Theresa May considers it an important legislation.
"This important legislation will disrupt the ability of people to travel abroad to fight and then return, enhance our ability to monitor and control the actions of those who pose a threat, and combat the underlying ideology that feeds, supports and sanctions terrorism," she said.
"The shocking attacks in Paris last month, in which 17 people lost their lives, and the many plots that the police and security and intelligence agencies continually work to disrupt, are clear evidence of the threat we face from terrorism.
"We have a fundamental duty as a government to ensure that the people who work to keep us safe have the powers they need to do so.”
Terrorism Prevention and Investigation Measures will allow Home Security to relocate suspected terrorists and require them to attend meetings with probation staff as part of their case management.
The new act also introduces new temporary exclusion orders to stop anybody coming from Iraq or Syria from returning to the United Kingdom. It would also allow law enforcement agencies to identify devices responsible for sending communication on the internet or accessing an Internet communications service.
