(b) In order to be effective, the annual election to be taxed pursuant
to this article must be made by an individual as described in subsection
(b) of section eight hundred sixty-one of  this  chapter  who  made  the
annual  election  to  be taxed pursuant to article twenty-four-A of this
chapter for the taxable year.
  (c) The annual election to be taxed pursuant to this article  must  be
made  on  or  before  the  due date of the first estimated payment under
section eight hundred sixty-four of this chapter and  will  take  effect
for  the current taxable year. Only one election to be taxed pursuant to
this article may be made during each calendar  year.  An  election  made
under  this section is irrevocable after such due date. To the extent an
election made under section eight hundred sixty-one of this  chapter  is
revoked  or otherwise invalidated an election made under this section is
automatically invalidated.