Subsection 107c(12) of the principal Act is amended by substituting for the definition of “revised estimate”
the following definition:
‘ “revised estimate” means a revised estimate made in the eleventh month of the basis period or if there is no revised estimate made in the eleventh month of the basis period, the revised estimate made in the ninth month of the basis period or if there is no revised estimate made in the ninth month of the basis period, the revised estimate made in the sixth month of the basis period.’.
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