From whom Bhagavatham should be heard

No learned man should be willing to hear a person who does not represent the original acarya. So the speaker as well as the audience were bona fide in this meeting where Bhagavatam was being recited for the second time. That should be the standard of recitation of Bhagavatam, so that the real purpose can be served without difficulty. Unless this situation is created, Bhagavatam recitation for 
extraneous purposes is useless labor both for the speaker and the audience. SB 1.4.1