§3.† If the one mandating cannot write, this is to be noted in the mandate itself and another witness is to be added who also signs the document; otherwise, the mandate is invalid. §4.† If the one mandating revokes the mandate or develops amentia before the proxy contracts in his or her name, the marriage is invalid even if the proxy or the other contracting party does not know this. CAN. 1106† A marriage can be contracted through an interpreter; the pastor is not to assist at it, however, unless