 What document allows regular payments of interest on Biotest Obligations?
Not (a) make or permit any payment on any Subordinated Debt, except, in the case of the Biotest Obligations, for regularly scheduled payments of interest permitted by the Subordination Agreement so long as no Event of Default exists immediately prior to the making of such payment or would result immediately after giving effect to the making of such payment or (b) amend any provision in any document relating to the Subordinated Debt which would increase the amount thereof or adversely affect the subordination thereof to the Obligations.
the Subordination Agreement