There is authorized to be appropriated for the purpose of making grants and providing fellowships under this chapter, without fiscal year limitation, not to exceed $30,000,000, which amount shall be increased by $3,500,000 on , and by $3,500,000 on . Any amounts appropriated under this section shall remain available until expended.July 1, 19741974-07-01July 1, 19751975-07-01