(a) The source blood shall be collected as prescribed in Sec. 640.4.
(b) Source blood may also be derived from Whole Blood manufactured in accordance with applicable provisions of this subchapter. [38 FR 32089, Nov. 20, 1973, as amended at 50 FR 4139, Jan. 29, 1985; 64 FR 45372, Aug. 19, 1999]