well, ok, it's under 41(1).

41 (1) If the Commissioner determines that a former reporting public office holder is not complying with his or her obligations under this Part, the Commissioner may order any current public office holders not to have official dealings with that former reporting public office holder.

but, let's compare that to the constitution:
https://www.justice.gc.ca/eng/csj-sjc/rfc-dlc/ccrf-ccdl/check/art2d.html

it's the kind of fucked up law you'd see in a backwards country like iran....

they should pay the $500 and send it to the supreme court for a reference decision.