A paid subscription application must register how?

I will soon launch with my developer partner an application with an economic model based on the monthly / annual subscription. All our new users (BtoB target) have a trial period upon their arrival on the application to see if our application corresponds to their needs. We would have liked to know how to declare this application on the apple store to be in the rules. I did not find any information in French on this subject. By thanking in advance those who will take the time to guide us.