This shall be the second law: He who engages in retail trade must be either a metic or a stranger.

And a third law shall be: In order that the retail trader who dwells in our city may be as good or as little bad as possible, the guardians of the law shall remember that they are not only guardians of those who may be easily watched and prevented from becoming lawless or bad, because they are well-born and bred; but still more should they have a watch over those who are of another sort, and follow pursuits which have a very strong tendency to make men bad.

And, therefore, in respect of the multifarious occupations of retail trade, that is to say, in respect of such of them as are allowed to remain, because they seem to be quite necessary in a state--about these the guardians of the law should meet and take counsel with those who have experience of the several kinds of retail trade, as we before commanded concerning adulteration (which is a matter akin to this), and when they meet they shall consider what amount of receipts, after deducting expenses, will produce a moderate gain to the retail trades, and they shall fix in writing and strictly maintain what they find to be the right percentage of profit; this shall be seen to by the wardens of the agora, and by the wardens of the city, and by the wardens of the country.

And so retail trade will benefit every one, and do the least possible injury to those in the state who practise it.
When a man makes an agreement which he does not fulfil, unless the agreement be of a nature which the law or a vote of the assembly does not allow, or which he has made under the influence of some unjust compulsion, or which he is prevented from fulfilling against his will by some unexpected chance, the other party may go to law with him in the courts of the tribes, for not having completed his agreement, if the parties are not able previously to come to terms before arbiters or before their neighbours.

The class of craftsmen who have furnished human life with the arts is dedicated to Hephaestus and Athene; and there is a class of craftsmen who preserve the works of all craftsmen by arts of defence, the votaries of Ares and Athene, to which divinities they too are rightly dedicated.