Plato, Laws

[850a] And if the purchase or sale is greater or more costly than is allowed by the law stating the limits of increase or decrease of property beyond which both of these transactions are forbidden, the amount of difference must at once (in the case of excess) be registered with the Law-wardens, and (in the case of deficiency) be cancelled. The same rule shall hold good regarding the registration of property in the case of resident aliens. Whosoever wishes shall enter on residence as an alien on fixed terms, since residence is permitted to a foreigner who is willing and able to reside, [850b] provided that he has a craft and remains in the country not more than twenty years from the date of his registration, without the payment of even a small aliens' tax, except virtuous conduct, or indeed any other tax for any buying or selling; and when his time has expired, he shall depart, taking with him his own property. And if within the period of twenty years it should happen that he has proved his merit by doing some signal service to the State, and if he believes that he can persuade the Council and Assembly to grant his request and authorize a [850c] postponement of his departure, or even an extension of his residence for life, whatever request he thus succeeds in persuading the State to grant to him shall be carried out for him in full. For the children of resident aliens, who are craftsmen and over fifteen years of age, the period of residence shall commence from the fifteenth year, and such an one, after remaining for twenty years from that date, shall depart whither he pleases, or if he desires to remain, he shall gain permission in like manner, and so remain; and he that departs [850d] shall go after first cancelling the entries which were previously made by him in the register at the magistrates' office.