The following has been updated and is available on the CBSA website:
BSF192 - Personal Exemption CBSA Declaration
https://www.cbsa-asfc.gc.ca/publications/forms-formulaires/bsf192-eng.html
Use this form if you are a resident of Canada, temporary resident of Canada, or a former resident returning to reside in Canada, and you are claiming a $800 personal exemption as described below. In addition, you must complete this form if you are claiming unaccompanied goods in your 7-day $800 exemption.