Questão jurídica principal
Whether the federal appeal against the interim legal-aid order was admissible due to irreparable legal harm.
Decisão extraída
Yes. Refusal to allow security for costs may cause irreparable legal harm because the appellants could otherwise lose any protection for their party costs.
Fundamentação extraída
The order exempted the respondent from security for costs, thereby preventing the appellants from obtaining the security they could seek; later review would not cure the missing protection for already incurred costs.