Example. A holds cumulative preferred stock that A retained in a transfer to which section 2701 applied. No dividends were paid in years 1 through 5 following the transfer. In year 6, A received a qualified payment that, pursuant to paragraph (c)(3) of this section, is considered to be in satisfaction of the unpaid qualified payment for year 1. No election was made to treat that payment as a taxable event. In year 7, A receives a qualified payment that, pursuant to paragraph (c)(4) of this section, is considered to be in satisfaction of the unpaid qualified payment for year 2. A elects to treat the payment in year 7 as a taxable event. The election increases A's taxable gifts in year 7 by the amount computed under paragraph (c) of this section with respect to the payments due in both year l and year 2. For purposes of any future taxable events, the payments with respect to years 1 and 2 are treated as having been made on their due dates.
26 C.F.R. §25.2701-4