[If] someone authorized his agent to give his daughter in kiddushin, and he went and gave her in kiddushin —- if his was first, his kiddushin is valid; if that of his agent was first, his kiddushin is valid; if it is not known, they both give a get. If they desire, one may give a get and the other may marry [her].  Similarly, [if] a woman authorized an agent to accept her kiddushin, and she went and accepted her own kiddushin —- if hers was first, her kiddushin is valid; if her agent’s was first, his kiddushin is valid; if it is not known, they both give her a get. If they desire, one may give her a get and the other marry [her].