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made before April 20, 1983 by the taxpayer as a shareholder corporation (within the meaning assigned by subsection 66(15)) to a joint exploration corporation of the shareholder, and
made before April 20, 1983 by the taxpayer as a shareholder corporation (within the meaning assigned by subsection 66(15)) to a joint exploration corporation of the shareholder, and
made before April 20, 1983 by the taxpayer as a shareholder corporation (within the meaning assigned by subsection 66(15)) to a joint exploration corporation of the shareholder, and