Original sentence: For UK nationals, acts performed outside the UK that would amount to an offence in the UK can be prosecuted as if they had been performed in the UK, regardless of how those acts are treated by the law of the other country
Edited sentence: Acts performed outside the United Kingdom have to constitute an offence in the country where they're committed, in order to constitute an offence under this Act.For UK nationals, acts performed outside the UK that would amount to an offence in the UK can be prosecuted as if they had been performed in the UK