(a) The reference methods in appendix A to this part except as provided under Sec. 60.8(b) shall be used to determine compliance with Sec. 60.722 as follows:
(1) Method 24 for determination of VOC content of each coating as received.
(2) For Method 24, the sample must be at least a 1-liter sample in a 1-liter container.
(b) Other methods may be used to determine the VOC content of each coating if approved by the Administrator before testing.