I've been watching quite a bit of daytime tv lately including several 'border security' type shows and combined with a couple of ideas from watching the old Sea Patrol series, I'm wondering to what extent Federation worlds would have a 'customs regime'?
Obviously the issue of employment (a major issue on many shows of the type) wouldn't be a problem as even if you don't subscribe to the 'no money in the Federation' idea (which I don't) it is clear that on Federation worlds and bases 'basic needs' are met from the central resource pool and people only work for personal reasons (hobby, boredom, wish for luxuries...), so the UFP probably has de facto open boarders for refuges and economic migrants.
However, unspent criminal convictions, transfer of hazardous or potentially dangerous materials (usually refer to a 'biosecurity') and illegal drugs could easily still be a thing IMO?
Obviously the issue of employment (a major issue on many shows of the type) wouldn't be a problem as even if you don't subscribe to the 'no money in the Federation' idea (which I don't) it is clear that on Federation worlds and bases 'basic needs' are met from the central resource pool and people only work for personal reasons (hobby, boredom, wish for luxuries...), so the UFP probably has de facto open boarders for refuges and economic migrants.
However, unspent criminal convictions, transfer of hazardous or potentially dangerous materials (usually refer to a 'biosecurity') and illegal drugs could easily still be a thing IMO?