According to Delek Group, the increase would take effect from Jan. 1, 2020.
The contracted quantity will increase partially (compared to the originally agreed quantity); the take or pay quantity will be 3 bcm/yr (106 bcf/yr); and the maximum total volume to be supplied over the entire contract period will be around 87 bcm (3 tcf).
This compares to 99 bcm (3.5 tcf) if the option had been exercised fully and 82.5 bcm (2.91 tcf) if it had not been exercised at all.