CFR > Title 15 - Commerce and Foreign Trade > SUBTITLE B—Regulations Relating to Commerce and Foreign Trade > CHAPTER II—NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE (parts 200 to 297) > SUBCHAPTER B—STANDARD REFERENCE MATERIALS (parts 230 to 230) > PART 230—STANDARD REFERENCE MATERIALS > SUBPART B—Purchase Procedure (§230.4 to §230.6)