462.6.1. Section 462.5 does not apply to a disposition of property at any particular time, in this section referred to as the “emigration disposition”, to which paragraph b of section 785.2 applies, by a taxpayer who is a recipient referred to in section 462.5, unless the recipient and the individual referred to in section 462.5, in their fiscal returns for the taxation year that includes the first time, after the particular time, at which the recipient disposes of the property, jointly elect that section 462.5 apply to the emigration disposition.