Art. 45 of the Federal Act on Civil Status and Marriage; joint divorce request before the Federal Court and irretrievable marital breakdown: a later agreement of the respondent spouse to the divorce may be taken into account on appeal, provided it finds support in the facts established by the cantonal courts and is not the product of collusion. Where those facts show such a deep deterioration of the marital relationship that continued cohabitation is incompatible with marriage, divorce must be granted. Costs may be charged to the spouse bearing the principal responsibility for the breakdown.