(1) For the purposes of proceedings for a divorce order, where, after the parties to the marriage separated, they resumed cohabitation on one occasion but, within a period of 3 months after the resumption of cohabitation, they again separated and thereafter lived separately and apart up to the date of the filing of the application, the periods of living separately and apart before and after the period of cohabitation may be aggregated as if they were one continuous period, but the period of cohabitation shall not be deemed to be part of the period of living separately and apart.
(2) For the purposes of subsection (1), a period of cohabitation shall be deemed to have continued during any interruption of the cohabitation that, in the opinion of the court, was not substantial.