You mean he approves. I would think that lex dura, sed lex ought to be acceptable, even if that is not the conventional order. And for my last quibble, isn't it more accurate to say the die is cast?
Thank you for a very nice quiz. However, I dare suggest a few corrections: "Anno domini" means "IN the year of the Lord", "Exempli gratia" means "FOR example", "prima nocte" means "ON the first night".