This particular ban has been removed only to favor Paksuzuki. Just like safety standards, emission standards, and quality standards have not been implemented to favor Paksuzuki and other assemblers as well.
Anyone with common sense and even a bit of loyalty to Pakistan would have instead of removing this ban made a regulation to introduce modern technology engines and cars instead. Semi hybrids and hybrids are way more fuel efficient than CNG (even if CNG is available which it is not in punjab). Semi - Hybrid (smart stop, eco idle, etc.) are already fast becoming norm in Japan and maruti suzuki is already working to implement it in its vehicle lineup in India with Suzuki Ciaz SHVS (Smart Hybrid Vehicle by Suzuki) already launched in India