(a) Only cottage cheese manufactured and packaged in accordance with the requirements of this part and with the applicable requirements in subpart A of this part which has been officially inspected in process and found to be in compliance with these requirements may be identified with the official USDA Quality Approved Inspection Shield.

(b) Nonfat dry milk. Nonfat dry milk, when used in cottage cheese bearing official identification, shall meet the requirements for U.S. Extra Grade (Spray Process), at time of use, and should be of U.S. Low Heat Classification (not less than 6.0 mg. undenatured whey protein nitrogen per gram of nonfat dry milk). In addition, the nonfat dry milk shall have a direct microscopic count not exceeding 75 million per gram. The age of the nonfat dry milk shall be covered by a USDA grading certificate, evidencing compliance with quality requirements, dated not more than 6 months prior to use of the dry milk. In the interim between manufacture and use, the nonfat dry milk shall be stored in a clean, dry, vermin-free space. In any case, if the nonfat dry milk is more than 120 days old, at time of use, it shall be examined for flavor to make certain that it meets the requirements for U.S. Extra Grade.