“(a)(1) Except as provided in paragraph (2), the amendments made by subsections (a) and (b) of section 101 [enacting this chapter] shall become effective on
April 1, 1981
.
“(2) The provisions of sections 1508, 1512, 1516, 1518, 1519, 1520, and 1521 [now 3108, 3112, 3116, 3118, 3119, 3120, and 3121] of title 38, United States Code, as added by section 101(a), shall become effective on
October 1, 1980
.
“(3) Notwithstanding paragraph (2), the provisions of chapter 31 of title 38, United States Code, as in effect on the day before the date of the enactment of this Act [
Oct. 17, 1980
] (other than section 1504, relating to subsistence allowances, and section 1507, relating to loans [former sections 1504 and 1507 of this title, respectively]), shall continue in effect until
March 31, 1981
.
“(4) Effective on
October 1, 1980
, sections 1504 and 1507 [former sections 1504 and 1507 of this title] are repealed. During the period beginning on
October 1, 1980
, and ending on
March 31, 1981
, the provisions of sections 1508 and 1512 [now 3108 and 3112] of title 38, United States Code, as added by section 101(a), shall apply to veterans pursuing a program of vocational rehabilitation training under chapter 31 of such title in the same manner as sections 1504 and 1507 of such title, respectively, applied to veterans pursuing a program of vocational rehabilitation training under such chapter on
September 30, 1980
.
“(5) Subsection (c) of section 101 [enacting provisions set out as a note under section 3108 of this title] shall become effective on
October 1, 1980
. Subsection (d) of such section [enacting provisions set out as a note under
section 3107 of this title] shall become effective on the date of the enactment of this Act [
Oct. 17, 1980
].”