This section shall be effective only for fiscal years beginning in the first fiscal year in which the amount appropriated under section
300ff–77 of this title to carry out this part, excluding the amount appropriated under section
300ff–28
(a)(2)(I) of this title, exceeds by at least $20,000,000 the amount appropriated under section
300ff–77 of this title to carry out this part in fiscal year 2000, excluding the amount appropriated under section
300ff–28
(a)(2)(I) of this title.