At the request of American Airlines, informal pre-authorization agreements were concluded between the United States and Canada in 1952 at Malton Airport (now Toronto Pearson International Airport). This was done with Canada`s passage of the 1974 Air Transport Preeminence Act, the Preclearance Act 1999 and the Canada-U.S. Act. Agreement on Air Transport Preclearance of 2001 expanded and formalized.  The pre-authorization agreement is completely reciprocal, which means that the Canadian government has the option of opening Canadian pre-licensing facilities in the United States. On average, U.S. international airports offer far fewer flights to Canada than the other way around, making it an expensive and ineffective thesis that has not been exercised by the Canadian government since 2019. In accordance with the agreement, these civil actions or proceedings must be initiated against the US government itself. But the State Immunity Act gives the United States immunity to any Canadian court, unless there is a death, personal injury or damage or loss of property, which means Charter violations such as free searches of a Canadian`s electronic devices or discrimination on the basis of race, religion, country of origin or sexual orientation. , would be outside the limited scope of the request for redress available, says Chang.
On 4 November 2016, Sweden and the United States signed an agreement that would make Sweden the second European country after Ireland to provide a prior declaration, although no announcement has yet been made as to the start date of the service. On the same day, DHS also announced that 11 other airports in nine countries had been added to the list of possible pre-authorization airports: The agreement is fully reciprocal in all modes of transportation, allowing Canadian officers of preclearance in the United States and U.S. CBP officers to conduct pre-deportations to Canada. The authorities granted in the agreement also apply to Canadian pre-cross officers working in the United States and U.S. pre-army pre-army officers in Canada. 2. The Schedule V provisions apply to the determination of flights for which the controller has issued prior authorization. 3. The inspection party has the right: Canada had completed all stages of the implementation of the Canada-U.S. pre-clearance agreement.
On June 17, 2016, the Minister of Public Safety and Emergency Prevention introduced Bill C-23, “a law to preserve the prior reporting of persons and property in Canada and the United States” (known as the Preclearance Act 2016) in the House of Commons. Bill C-23 received royal approval on December 12, 2017. The United States is currently conducting advance authorizations at the following airports in Canada: on June 6, 2013, the U.S. House of Representatives passed an amendment proposed by MPs Pat Meehan (R-PA), Candice Miller (R-MI) and Peter DeFazio (D-OR), which prohibits the United States.