during the period beginning on March 1, 2020, and ending on December 21, 2020, the Secretary concerned shall extend the period of entitlement prescribed in subsection (a) for a period equal to the number of months that the person was so prevented from using such entitlement, as determined by the Secretary. . 5. Restoration of entitlement to rehabilitation programs for veterans affected by school closure or disapproval (a) Entitlement During the period beginning on March 1, 2020, and ending on December 21, 2020, section 3699 of title 38, United States Code, shall read as if it was amended by striking chapter 30, each time it appears and inserting chapter 30, 31, . (b) Payment of subsistence allowances During the period beginning on March 1, 2020, section 3680(a)(2)(B) of title 38, United States Code, shall read as if it was amended— (1) by inserting or a subsistence allowance described in section 3108 before , during