in our troop, there isnt anything written, but the advancement chair wont take the card unless another scout comes over and does the badge with you.also, if another counsler is available in the district, the scout is suppossed to go to them. for example, my dad was the only counsler who had camping mb, within our district. my friend came over, and we did it and finished it side by side. my dad also has enviromental science, but another asm has it also, so i have to go to him.