Each such county may in like manner from time to time issue refunding warrants and refunding certificates of indebtedness, either by sale or by exchange, for the purpose of refunding a like or greater principal amount of warrants and certificates of indebtedness then outstanding which were issued under the provisions of this article. The provisions of this article applicable to the original issue of such warrants and certificates of indebtedness so refunded shall likewise be applicable to any refunding warrants and refunding certificates of indebtedness; except, that in the event such refunding warrants or refunding certificates of indebtedness are sold the proceeds from such sale shall be used only to retire the warrants and certificates of indebtedness refunded thereby; and except that said refunding warrants and refunding certificates of indebtedness shall not be charged against the limitation on the amount of warrants and certificates of indebtedness that may be issued under the provisions of this article as set out in section 11-9-2.