Regulations that create positive obligations -- "you must do this" -- create barriers to entry, because it costs money to do that. But I'm not sure it's the sam

Regulations that create positive obligations -- "you must do this" -- create barriers to entry, because it costs money to do that. But I'm not sure it's the same with regulations that create negative obligations, because not doing stuff is usually free, except when the negative obligation is actually a positive obligation "to prevent xyz".