(a) If you have previously been using a ready-to-use sampling plan and the next report year is your mandatory sampling year;
(b) If you have previously been using a sampling plan, but it is not based on the conditions of your service;
(c) If you have previously been using a template sampling plan, but you must revise it for your next sampling year according to Subsection 56; or
(d) If you previously have been using an alternative sampling plan, but would like to:
(1) improve your sampling efficiency,
(2) change the unit of sampling and measurement,
(3) change the sampling structure, or
(4) use a different sampling frequency.