IDR and tinted glass

When the two govts are trying so hard to get things going in the IDR, two agencies from opposite side are doing or not doing things to facilitate the movement of vehicles through the causeway. Both sides have different specifications for tinted car windscreens which technically makes travelling by cars a pain to the travellers. What is acceptable and not acceptable is going to irritate all the drivers. Can't the two agencies sit down and talk over kopi and decide on a common specs for the benefits of travellers/drivers? Or should such a minor issue become another sore point to the two agencies and to travellers?