Because it’s 2022 cusp of 2023 (not 1975) and this notation is on customs declaration to give people the heads up their data is collected for enforcement & compliance
https://www.cbsa-asfc.gc.ca/publications/forms-formulaires/e311-eng.html
“Information provided is collected under the authority of Section 12 of the Customs Act to facilitate compliance with the traveller’s obligation with Subsection 5(3), Reporting of Imported Goods Regulations, and enables the collection of duty and taxes payable on imported goods.
This information may be disclosed to other government departments and agencies, police forces and other Countries to administer or enforce Canadian Legislation.”
Note the last sentence in bold
Data is collected for departing passengers & arriving and is then dispersed to other departments & agencies . The IRCC being one. It’s used so individuals don’t attempt to circumvent policies in place . ESDC uses the data to enforce compliance with benefits . The CRA does the same for benefits . The IRCC would as well
When I worked at the ESDC individuals who left the country and still were claiming benefits they weren’t entitled too would get a rude awakening when they’d have said benefits clawed back & penalties assessed. ESDC would get their arrival & departure record data from customs . That’s an example how individuals are “ tracked “, when out of the country