In annual report 2017,point 2 of principal 2 states regarding this.

In annual report 2016=17 p. 74

"Ashok Leyland has a very clear laid out policy on sustainable sourcing called the “Green Supply chain initiative”. This TPH (Tooling, Painting and Handling) document signed off with each vendor for every component talks of the way our vendors package the parts and supply to Ashok Leyland. Reduced usage of wood, cardboard/paper and polythene is allowed to be used for packaging. This is done towards contributing for better environment"