In addition to a positive assessment of debt sustainability, exceptional access could be made dependent on convincing arguments that failure to provide such support might threaten the global financial system.
If such systemic criteria applied, it would also have to be demonstrated why a temporary standstill (like a bank holiday in a national banking crisis) would not be a suitable alternative and whether any expected contagion effects would be better mitigated by lending to the crisis-stricken country rather than to the potentially affected countries.