regulation period
For the purposes of this section, the prior period specified in 905.52 is hereby established as an average week within the immediately preceding three seasons. Each handler's average week shall be computed by adding the total volume of red seedless grapefruit handled in the immediately preceding three seasons and dividing the total by 99. The average week for handlers with less than three previous seasons of shipments shall be calculated by adding the total volume of shipments for the seasons they did ship red seedless grapefruit, divide by the number of seasons, divide further by 33. If crop conditions limit shipments from any or all of the immediately preceding three season(s), the committee may use a prior season or seasons for the purposes of calculating an average week. New handlers with no record of shipments could ship size 48 and 56 red seedless grapefruit as a percentage of total shipments equal to the percentage applied to other handlers' average week; once such handlers have recorded shipments, their average week shall be calculated as an average of total shipments for the weeks they have shipped red seedless grapefruit during the current season. When used in the regulation of red seedless grapefruit, the term season means the weeks beginning the third Monday in September and ending the first Sunday in the following May. The term regulation period means the 22-week period beginning the third Monday in September of the current season.