Income tax, state; rolling conformity.

Income tax; rolling conformity. Provides that when Virginia does not conform on a rolling basis to federal tax laws due to any changes in a single act of Congress with an impact of more than $15 million on revenues in the year in which the amendment was enacted or any of the next four years, such nonconformity shall not be considered for purposes of calculating the nonconformity threshold for all amendments in a year with a cumulative projected impact of more than $75 million in the year in which the amendments were enacted or any of the next four years.