<h1>New SION Guidelines for Synthetic Yarn: Input Norms, Dye Restrictions, and Captive Power Rules Explained</h1> The Standard Input-Output Norms (SION) for grey or dyed spun yarn made from man-made synthetic staple fibers such as polyester and viscose, as well as their blends. It specifies the required quantities of inputs like man-made staple fibers, polyester/viscose tow, and various dyes needed per kilogram of the export product. The norms also mention that disperse dyes are not permissible if the imported item is already dyed polyester or viscose staple fiber. Additionally, the use of furnace oil is restricted to units with captive power generation facilities. The schedule emphasizes that imported goods must be used in the export product.