"Advanced fraction" means a fraction that has as its numerator the amount of the advanced tax and as its denominator the value of the interests in insulated property to which that tax is attributable.
"Advanced tax" means the aggregate amount of estate tax attributable to interests in insulated property that is required to be advanced by uninsulated holders under subsection (c).
"Insulated property" means property subject to a time-limited interest that is included in the apportionable estate but is unavailable for payment of an estate tax because of impossibility or impracticability.
"Uninsulated holder" means a person who has an interest in uninsulated property.
"Uninsulated property" means property included in the apportionable estate other than insulated property.
HRS § 560:3-1306