VOC limits

GS-11 standards refers to ASTM D6886 only in its new version, but credit language refers to GS-11 1993 version - and at that time GS-11 referred to EPA method 24, which is equivalent to ASTM methods D2369 and D3960. ASTM D6886 is better, but not within specifications of this credit.
Hopefull this will be improved in LEED 2012.

ASTM D6886 was developed due to ASTM D3960 having poor precision when dealing with voc content determination low VOC content waterborne coatings. If the manufacturer of your choosen paint can show that they are below the GS-11 voc content limits, then I would submit that documentation, but know that the D6886 was developed due to some inaccuracies with D3960 - so I would guess that it would not be seen as equivalent.

You could also show compliance by this paint if it has passed the requirements of the CA 01350 product emission test. This is how paints & coatings are ask to show compliance with EQc4.2 within LEED for Schools projects. Due to this, if a paint shows compliance through actual low-emissions it would qualify in other LEED Rating Systems.

Dear sirs, for a european project under LEED Retail CI 2009 we want to achieve the credit EQ 4.2 by using a low VOC internal wall paint ; the paint we've chosen has a laboratory test (content < 1 gram/liter) made under iso 11890 but our Leed consultants isn't sure the test is complying with Leed approved test method GS 11, 2013. I've seen In GS-11 standard that International Organization Standardization (ISO) 11890 is accepted; can someone confirm that ISO test 11890 for internal wall paint is fully accepted with no restriction?

See the response to a similar question:
http://www.leeduser.com/credit/CI-2009/IEQc4.2?page=0#comment-53064