(1)The court has jurisdiction to entertain proceedings for a dissolution order or a separation order if (and only if)—
(a)the court has jurisdiction under section 219 regulations,
(b)no court has, or is recognised as having, jurisdiction under section 219 regulations and either civil partner is domiciled in Northern Ireland on the date when the proceedings are begun, or
(c)the following conditions are met—
(i)the two people concerned registered as civil partners of each other in Northern Ireland,
(ii)no court has, or is recognised as having, jurisdiction under section 219 regulations, and
(iii)it appears to the court to be in the interests of justice to assume jurisdiction in the case.
(2)The court has jurisdiction to entertain proceedings for a nullity order if (and only if)—
(a)the court has jurisdiction under section 219 regulations,
(b)no court has, or is recognised as having, jurisdiction under section 219 regulations and either civil partner—
(i)is domiciled in Northern Ireland on the date when the proceedings are begun, or
(ii)died before that date and either was at death domiciled in Northern Ireland or had been habitually resident in Northern Ireland throughout the period of 1 year ending with the date of death, or
(c)the following conditions are met—
(i)the two people concerned registered as civil partners of each other in Northern Ireland,
(ii)no court has, or is recognised as having, jurisdiction under section 219 regulations, and
(iii)it appears to the court to be in the interests of justice to assume jurisdiction in the case.
(3)At any time when proceedings are pending in respect of which the court has jurisdiction by virtue of subsection (1) or (2) (or this subsection), the court also has jurisdiction to entertain other proceedings, in respect of the same civil partnership, for a dissolution, separation or nullity order, even though that jurisdiction would not be exercisable under subsection (1) or (2).