“(7). The parties must have legal capacity to marry each other20. If there is a legal impediment which is permanent, for example forbidden degrees of relationship, the couple will never be married, however long they cohabit. However, if the legal impediment is temporary, for example non-age or the fact that one of the parties is already validly married to a third party, the couple may become married after the temporary impediment has been removed21. In these circumstances, the relevant period of cohabitation for the purpose of inferring tacit consent is restricted to the period of cohabitation after the impediment has been removed22, though the period before the removal of the impediment may be taken into account in determining the character of the cohabitation23.”