Yes, the usage of the Guardtek (Patrol, Post, mPost, Protect) requires a simplified declaration.
This can be done online and only takes few minutes:
It's related to norm #46 "Employee Management" and #51 "Geolocating employees' vehicles" (if you use GPS features of mPost, Patrol or Protect app).
*It usually takes 7 days to get the C.N.I.L. receipt.