(a) Starting with the year after the first year of production and during the last two weeks of a month prescribed by the department, the operator of a “Bass Island” well must annually measure static pressures at the midpoint of the production zone and at points 500 feet and 1,000 feet above that point. The department will notify operators at least 60 days in advance of the taking of those pressures that the respective “Bass Island” pool must be shut-in for a minimum period stated in the notice, not to exceed two weeks. The operator must make measurements as set forth in section 559.3(a) of this Part. That operator must file with the department on a form the department prescribes the results of those measurements no later than 30 days after the measurements were taken. The department may, on an administrative basis, revise the testing procedures or reduce the frequency or eliminate the tests under this subdivision when in its judgment, revision, reduction, or elimination is indicated.