Functions of Coal Controller Organisation Under Colliery Control Rules 2004 and Colliery Control (Amendment) Rules, 2021 is to lay down procedure and standard for sampling of coal, inspection of collieries so as to ensure the correctness of the class, grade or size of coal, issues directives for the purpose of declaration and maintenance of grades of coal of a seam mined in a colliery and act as the appellate authority in case of dispute between consumers and owner arising out of declaration of grade and size of coal. Coal Controller Organisation also do quality surveillance with respect to maintenance of grade according to laid down procedures regarding grades and sizes.