OIML R 80-2 is applicable to the type evaluation of complete road and rail tankers with level gauging and also for type evaluation of the following separate components:  the measuring tank;  the level gauging device; and  the indicating device. Initial and subsequent verifications in accordance with OIML R 80-2 are applicable to complete road and rail tankers with level gauging, as defined in OIML R 80-1. OIML R 80-2 sets out details of the test program, principles, equipment and procedures to be used for type evaluation, initial and subsequent verification testing. National regulations may require some of the provisions in this Recommendation to apply to ancillary devices as well