Neither of them has proposed to go substantially further and repeal federal prohibition. (blog.politics.ox.ac.uk)
It also eased the threat that the Department of Justice under Attorney General Jeff Sessions — a staunch foe of legalization — would step up enforcement of federal prohibitions on sales and use of marijuana in states such as Colorado. (nydailynews.com)
There are federal prohibitions against allowing an embryo to develop past the point where it forms a structure called a primitive streak, which happens on the 15th day after fertilization. (statnews.com)