source: widows and widowers of police officers are in the same position, in that they have their pension removed if they re-marry or cohabit. # Cohabitation has to be proved.
target: widows and widowers of police officers are in the same position, in that they have their pension removed if they re-marry or cohabit. And since If widows' pensions are to be removed because of cohabitation, cohabitation has to be proved. Cohabitation has to be proved.