(a) Voluntary. An application for analysis and testing may be made by contacting the director or supervisor of the Science and Technology laboratory where the service is provided, or by contacting the Technical Services Branch Chief at Science and Technology Headquarters, Washington, DC. A list of the Science and Technology laboratories is included in § 91.5.

(b) Mandatory. In the case of mandatory analyses, such as those required to be performed on eggs and egg products, application for services may be submitted to the office or USDA agency which administers the program, or by contacting an inspector or grader who is involved with the program.