The President may declare a natural gas supply emergency (or extend a previously declared emergency) if he finds that -
Any declaration of a natural gas supply emergency (or extension thereof) under subsection (a) of this section, shall terminate at the earlier of -
Nothing in this subsection shall prohibit the President from extending, under subsection (a) of this section, any emergency (or extension thereof), previously declared under subsection (a) of this section, upon the expiration of such declaration of emergency (or extension thereof) under paragraph (1)(B).