[ULPIANUS libro tertio decimo ad edictum. ] §4.8.29.prAduersus sententiam arbitri fit, si petatur ab eo a quo arbiter peti uetuit.
[ULPIANUS in his thirteenth book on the Edict.] An act is done contrary to the decision of the arbitrator if a demand is made from the person from whom the arbitrator forbade a demand to be made.
quid ergo si a fideiussore eius petatur, an poena committatur? et puto committi, et ita Sabinus scribit: nam τῃ Δυνάμει a reo petit.
What then if a demand is made from his surety? Is the penalty incurred? I think it is incurred, and Sabinus writes so; for in effect he demands from the principal debtor.
sed si cum fideiussore compromisi et a reo petatur, nisi intersit fideiussoris, non committetur.
But if I have entered into an arbitration agreement with a surety and a demand is made from the principal debtor, the penalty will not be incurred, unless it concerns the surety.