For the purposes of this subsection—

(A) A “full-time elementary or secondary school student” is an individual who is in full-time attendance as a student at an elementary or secondary school, as determined by the Commissioner of Social Security (in accordance with regulations prescribed by the Commissioner) in the light of the standards and practices of the schools involved, except that no individual shall be considered a “full-time elementary or secondary school student” if he is paid by his employer while attending an elementary or secondary school at the request, or pursuant to a requirement, of his employer. An individual shall not be considered a “full-time elementary or secondary school student” for the purpose of this section while that individual is confined in a jail, prison, or other penal institution or correctional facility, pursuant to his conviction of an offense (committed after the effective date of this sentence 1 1 See References in Text note below. ) which constituted a felony under applicable law. An individual who is determined to be a full-time elementary or secondary school student shall be deemed to be such a student throughout the month with respect to which such determination is made.

(B) Except to the extent provided in such regulations, an individual shall be deemed to be a full-time elementary or secondary school student during any period of nonattendance at an elementary or secondary school at which he has been in full-time attendance if (i) such period is 4 calendar months or less, and (ii) he shows to the satisfaction of the Commissioner of Social Security that he intends to continue to be in full-time attendance at an elementary or secondary school immediately following such period. An individual who does not meet the requirement of clause (ii) with respect to such period of nonattendance shall be deemed to have met such requirement (as of the beginning of such period) if he is in full-time attendance at an elementary or secondary school immediately following such period.

(C) (i) An “elementary or secondary school” is a school which provides elementary or secondary education, respectively, as determined under the law of the State or other jurisdiction in which it is located. (ii) For the purpose of determining whether a child is a “full-time elementary or secondary school student” or “intends to continue to be in full-time attendance at an elementary or secondary school”, within the meaning of this subsection, there shall be disregarded any education provided, or to be provided, beyond grade 12.

(D) A child who attains age 19 at a time when he is a full-time elementary or secondary school student (as defined in subparagraph (A) of this paragraph and without application of subparagraph (B) of such paragraph) but has not (at such time) completed the requirements for, or received, a diploma or equivalent certificate from a secondary school (as defined in subparagraph (C)(i)) shall be deemed (for purposes of determining whether his entitlement to benefits under this subsection has terminated under paragraph (1)(F) and for purposes of determining his initial entitlement to such benefits under clause (i) of paragraph (1)(B)) not to have attained such age until the first day of the first month following the end of the quarter or semester in which he is enrolled at such time (or, if the elementary or secondary school (as defined in this paragraph) in which he is enrolled is not operated on a quarter or semester system, until the first day of the first month following the completion of the course in which he is so enrolled or until the first day of the third month beginning after such time, whichever first occurs).