Regardless, it would seem odd. If the DOE amended their commencement date to 2028, they would (And SHOULD) have updated their website since then? But we will find out soon enough!
It clearly says 4028 is amended to say: "The authorization period will commence when Delfin commences commercial export of domestically sourced LNG from the Delfin Liquefaction Facility and will extend through December 31, 2050." Would that not suggest an open ended start date not connected to the previous 6/24 deadline?