Canon 1171

A compromise is invalid if: (1) the norms determined for the

validity of contracts which exceed ordinary administration have

not been observed; (2) it is not carried out in writing; (3)

the procurator agreed to the arbitration without a special mandate, or the prescriptions of cann. 1169 and 1170 were violated;

(4) the controversy has not arisen or does not arise from a

contract which is certain according to the norms of can. 1168,

2.