Proposal to clarify the text:
- clarify Annex 4 and exclude aluminum-alloy and magnesium-alloy wheels under test (b)
- clarify Annex 6 with regard to possible defects caused by the production process and not affecting the appearance of cracks during testing
- recommend under Annex 6 to identify cracks occurred as a result of the test by using penetrating paints
- clarify Annexes 7 and 8 with regard to air leakage.