(a) A crop will not be eligible for certification if planted on land where peanuts, other than a certified crop of the same variety, were grown in the previous two (2) years.
(b) A field which includes an area where peanuts were threshed, or where peanut refuse of another variety was spread during the preceding year, or peanut refuse of the same uncertified variety of peanut, shall not be eligible for certification.