The legislation applies to deals that would give foreign investors access to UK technology and intellectual property, as well corporate takeovers.
Penalties for violating the new rules will be steep, including fines of up to £10 million ($19.6m), or 5 per cent of worldwide revenue, whichever is higher.
"This bill gives the government the power to scrutinise broad swathes of M&A activity with any UK nexus," said Nicole Kar, head of UK competition at the law firm Linklaters. "We therefore anticipate that foreign investment rules, both in the UK and internationally, will be an increasingly onerous consideration for overseas investors planning international transactions."
The government is facing competing pressures to protect strategic national interests while attracting foreign investment after its withdrawal from the European Union.
Sharma said the legislation shouldn't be an impediment to foreign investment, which created more than 46,000 jobs throughout the UK in the last financial year.
Among the transactions that could be affected is US-based Nvidia's plans to buy Arm Holdings, which designed the chips used in most mobile phones, in a deal worth up to US$40 billion.
The British government has already said it could intervene in the takeover under existing laws because of the "vital role" Arm plays in the UK's tech sector. The move, which would create a global powerhouse in the chip industry, is also being scrutinised by regulators in the US, China and EU.
Some lawyers raised concerns about the legislation's retroactive provisions. The bill would give the government power to retroactively review deals in the wider economy for up to five years, even though they aren't subject to mandatory notification.
"The timing is interesting given the current rhetoric that Global Britain is open for worldwide business as we leave the EU," said Samantha Mobley, a specialist in competition and mergers at Baker & McKenzie in London. "As the system will be retrospective, from today, investors into the UK must navigate the complexities of working out whether their deal falls on the wrong side of the national security calculus."
- Associated Press