2257 requirements are different from country to country. Usually it is better to respect USA regulations, but they may not be good for yours.
Read online or if you're unsure, consult an attorney. You could get in jail if you don't respect it fully, so it's not something to play with.
https://ilt.eff.org/index.php/2257_R...g_Requirements
https://www.2257services.net/dojfaq.php
http://2257.info/