Section 25.105 - Critical components and critical items(a) The following is a list of articles that have been determined to be a critical component or critical item and their respective preference factor(s). (b) The list of articles and preference factors in paragraph (a) of this section will be published in the FEDERAL REGISTER for public comment no less frequently than once every 4 years. Unsolicited recommendations for deletions from this list may be submitted at any time and should provide sufficient data and rationale to permit evaluation ( see 1.502).(c) For determining reasonableness of cost for domestic end products that contain critical components or are critical items ( see 25.106(c)).