Ok I hear you but I thought that the main differences between supplemental and normal were alternates and filing/dispatch/etc not the other things. We're still limited to 8 hours with 2 crew, 12 hours with 3 crew and FAR duty limits that are drawn from straight 121. I can't find any specifics in the FARs that make differences between 121 and 121 Supplemental. Are these written down specifically anywhere?