A prison rule banning inmates from wearing Easter lilies is being challenged in court.
The High Court in Belfast has granted leave for a judicial review of the ban.
The judge also ordered the governor of Maghaberry prison to suspend a punishment given to a prisoner for wearing a lily on Easter Sunday.
Terrence McCafferty, who is serving a 12-year sentence for a bombing, had been sentenced to three days in a punishment unit.
It is expected that the rest of the case will be heard next month.