What are the rules of Catholic Church on celebration of Holy Mass along with the administration of Sacrament of Matrimony?

Of late, it has become a rule rather than exception to celebrate Holy Mass along with the Sacrament of Matrimony, in many places. It is beneficial on Sundays for the invitees who may come from far off places. But, with back-to-back Services to cater to increased number of the faithful, many churches do not allow marriage on Sundays. That puts additional burden on weekdays on churches which may have to accommodate too many number of weddings combined with Holy Mass, each running into hours. Moreover, with inter-faith marriages increasing in frequency, it becomes a matter of worry for the Celebrant to ' convince' non-Catholics (and sometimes Non-Christians) who come forward to receive Holy Communion. It is also not clear if the Holy Mass can be interluded with the prayers of Sacrament of Matrimony, with the Celebrant digressing from the Missal here and there to insert prayers ' suitable to the special occasion' My question is : What are the rules of Catholic Church on celebration of Holy Mass along with the administration of Sacrament of Matrimony ?