i know BP's(or any other snakes) arent supposed to be housed together,but is it true that if the BP's are 1+ yrs older they can be housed together as long as they're housed in a large tank, is that actually?

long story short:

yesterday this customer at petco was gonna buy 2 BP's,so the employees told me to give him "tips" for the new BP owner.so i told him the basics which took a few mins (and i accidently held up the line while doing so),first thing i told him is that BP's cannot be housed together. afterwards my team leader came up to me and said that she called the petco "certified reptile specialist" and he said that BP's can be housed together as long as they're 1+ yrs older and that they're housed in a large tank.at the same time she scolded me because im not their certified reptile specialist therefore im not allowed to give info to customers( then why the heck did she tell me to give them tips?).obviously i kept saying it wasnt true but the only excuse she was using is that he's the reptile specialist and im not so basically he's right and im wrong. ok so it wasnt so short but thats the mina portion of the story.