An objector to whom an information requirement has been given must comply with the requirement within the following period—
(a) generally—the period that ends 28 days after the day the valuer-general made the information requirement (the
"usual period" );
(b) if, within the 28 days, the valuer-general and the objector agree in writing to a longer period that ends not more than 14 days after the usual period ends—the longer period.