 On all federally funded construction projects, materials produced within the state or local area shall not be favored over comparable materials produced outside of the state or local area. Also, in-state material sources cannot be given preference over foreign materials or actions taken against materials of foreign origin unless permitted by federal law. State or local preference provisions are not allowed on federally funded project contracts. 000.0.0.0.0.0 Contract Documents Involving Proprietary Products or System (00 CFR 000.000) Generally, on federal aid projects, the use of trade names in plans and specifications is not allowed except as outlined in 