Chapter 11. Tax Exemptions 5. If the sale or transfer occurs within 90 days from the date of the transaction under which the exemption is claimed, it is presumed that the sale or transfer qualifies for this exemption. If the sale or transfer occurs after the 90th day following the date of the transaction under which the exemption is claimed, it is presumed that the transfer does not qualify for this exemption. Both of the presumptions under 830 CMR 64H.25.1(8)(g)5. are rebuttable, and may be overcome by sufficient evidence to the contrary. 6. If the Commissioner reasonably believes that the transaction under which the exemption is claimed was undertaken not for a bona fide business purpose but to avoid imposition of any tax, the exemption will not be approved. 6/97