(19) Contracts. Plato's law that '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,' according to Pollux (quoted in Telfy's note) prevailed also at Athens. (20) Trade regulations. (a) Lying was forbidden in the agora both by Plato and at Athens (Telfy). (b) Athenian law allowed an action of recovery against a man who sold an unsound slave as sound (Telfy). Plato's enactment is more explicit: he allows only an unskilled person (i.e. one who is not a trainer or physician) to take proceedings in such a case. (c) Plato diverges from Athenian practice in the disapproval of credit, and does not even allow the supply of goods on the deposit of a percentage of their value (Telfy). He enacts that 'when goods are exchanged by buying and selling, a man shall deliver them and receive the price of them at a fixed place in the agora, and have done with the matter,' and that 'he who gives credit must be satisfied whether he obtain his money or not, for in such exchanges he will not be protected by law. (d) Athenian law forbad an extortionate rate of interest (Telfy); Plato allows interest in one case only--if a contractor does not receive the price of his work within a year of the time agreed--and at the rate of 200 per cent. per annum for every drachma a monthly interest of an obol. (e) Both at Athens and in the Laws sales were to be registered (Telfy), as well as births (Telfy). (21) Sumptuary laws. Extravagance at weddings (Telfy), and at funerals (Telfy) was forbidden at Athens and also in the Magnesian state. There remains the subject of family life, which in Plato's Laws partakes both of an Athenian and Spartan character. Under this head may conveniently be included the condition of women and of slaves. To family life may be added citizenship.