Please delete (or give a very good rationale for) paragraph 1, section 3, Article III:
“The immigration of people, by States considered to be permissible, is not
prohibited by the European Congress before the year 20XX.”
As far as I can tell, this comes from the US constitution where it served the purpose of allowing the slave trade to continue for some years after the US constitution was ratified.
For reference, here’s the US original:
“The Migration or Importation of such Persons as any of the States now existing shall think proper to admit, shall not be prohibited by the Congress prior to the Year one thousand eight hundred and eight, but a Tax or duty may be imposed on such Importation, not exceeding ten dollars for each Person.”