VOC Content in VOC Budget Method

Any product used that has not been tested by a recognized protocol, should not be used at all. In order to complete a VOC budget, you must "account for" all products in a category used on a project

Is that the case even if the manufacturer claims there is no VOC content at all in his product? Said otherwise, if a product does not contain any VOC source (zero solvent, zero glycol,...) does it need to be tested anyway to confirm the manufacturers claim?

For IEQc4.2 in NCv2009, the LEED-Online form requires entering each product’s actual VOC content in grams per liter (g/L). Each of the referenced standards (Green Seal GS13-1993 & GC03-1997, SCAQMD-1113-2004, & CARB-2007) prescribes the same means of calculating VOC content, all determined according to EPA Method 24. Therefore, manufacturers must report VOC content accordingly. See the comment entitled “Verify Your Information” under the “Bird’s eye view” tab at the top of this page. [LEEDv4 is somewhat less rigid about methodology than LEEDv2009 is. Note that USGBC now allows LEEDv4 Credit Substitutions for several LEEDv2009 credits. For more, see the most recent Global ACP Supplements and http://www.usgbc.org/articles/use-v4-credits-your-v2009-project.]