Top government and police officials have backed tough security measures which will be imposed on Sydney ahead of this weekend's ASEAN summit.
Security will tighten as protest leaders prepare to send a message to the world leaders gathering for the summit.
Prime Minister Malcolm Turnbull will host Southeast Asian leaders on Saturday and Sunday for a special summit to discuss regional security, economic ties and counter-terrorism measures.
NSW Police Minister Troy Grant beefed up police powers to allow the force to block off parts of the city, conduct searches, remove vehicles that are causing obstructions and prevent drone flights.
NSW Police Assistant Commissioner Michael Willing said the laws, which will temporarily allow traffic changes and road closures, will see ASEAN's VIPs travel safely through the city.
But he told reporters in Sydney on Wednesday the powers "strike the right balance" between effective policing and not disrupting residents and visitors to Sydney.
"Please come in to the city over the weekend, enjoy what the city has to offer," the counter-terrorism commander urged visitors.
Foreign Minister Julie Bishop said she was confident security would be "as thorough as possible".
"I'm confident the security arrangements will be appropriate," Ms Bishop told reporters in Sydney on Wednesday.
Mr Grant has not provided details about where police will focus their efforts, although it's understood one focus will be the harbourside suburb of Kirribilli, where Mr Turnbull often hosts events at the prime minister's official Sydney residence, Kirribilli House.
Representatives of Sydney's Cambodian diaspora are staging two demonstrations in the CBD over the weekend to protest the country's visiting prime minister Hun Sen.
Mr Willing said police had sufficient resources to deal with people who "protest certain issues" related to the ASEAN gathering.
Police will happily facilitate the protests as long as they were law-abiding, he added.
The police minister said the laws were waiting for final approval and would be introduced on Wednesday.