Gofynnwyd i Gyngor Caerdydd sicrhau rhagor o eglurder o ran ai eu pecyn o fesurau fyddai’r ffordd fwyaf priodol o sicrhau cydymffurfiaeth o fewn y cyfnod byrraf posibl. Gofynnwyd am ragor o dystiolaeth a fyddai’n cyfiawnhau’r safbwynt na fyddai Parth Aer Glân yn opsiwn addas.
Cardiff Council was asked to provide further clarity their identified package of measures was the route most likely to achieve compliance in the soonest time possible. This included a request for further evidence to justify why a charging Clean Air Zone was not a suitable option.