At about 0:36, the father says: "It's like getting a licence to drive a car. You have to be approved."
Even though there are no scriptures I can think of that show a requirement for someone to pass a formal 'interview' or test before they can start preaching. In the same way as there is no Biblical requirement to turn in a "service report" each month.
Two major ways in which man-made rules have been added to what was written for the sake of administrative and corporate convenience, turning what should be a spontaneous and enthusiastic sharing of one's beliefs motivated by personal desire, into a rigid, structured "assignment" at the behest of an organisation. Quite Pharisaical, in fact.