37. The expert from China introduced ECE/TRANS/WP.29/GRE/2012/35 and GRE-68-35, proposing to improve the resistance test of lens material to atmospheric agents. GRE noted some comments about the the impact of changed requirements and test methods on the re-qualification of existing approved materials, even if in principle the regulation could be updated. The expert from SAE provided the secretariat with written comments after the meeting (GRE-68-41) to the proposals tabled by the expert from China.