50 ILCS 415/3
Nothing in this Act shall be construed to permit any invested or reinvested moneys or cash equivalents or any income or profit derived therefrom to be transmitted out of any escrow established pursuant to Section 2 of this Act until such time as there are sufficient moneys or cash equivalents invested or reinvested in such escrow, independent of future interest income or profit to be derived therefrom, to pay all remaining principal and interest until maturity of the debt which is the subject of that escrow, nor to permit any invested or reinvested moneys or cash equivalents or any income or profit derived therefrom to be transmitted out of such escrow if such action would reduce the amount of such escrow below the amount needed for payment of all remaining principal and interest until maturity of the debt which is the subject of that escrow.
50 ILCS 415/3