base period

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base pe·ri·od

(bās pēr'ē-ŏd)
12-month time duration divided into quarters.
References in periodicals archive ?
TEI objects to a rule that limits increases in the base period ratios but does not apply correspondingly to limit decreases in the ratios.
and foreign base period ratios substantially limit the ability of a taxpayer to manipulate the netting rule.
TEI believes that application of the 110-percent limitation to each base period year for each ratio serves no valid purpose.