Judgment Satyeshwar Roy, J. 1. Learned Counsel for the parties agreed that all the seven writ petitions are verbatim copies of statement of facts stated in CWJC No.606 of 1985 (R ). The question of law involved in these petitions and pressed on behalf of the petitioners are similar. These applications, therefore, were heard together and are being disposed of by this judgment. 2. All the petitioners (Companies incorporated under the Indian Companies act, Partnership Firm, and individuals) carry on business of manufacturing briquettes from slurry or sludge. The petitioners collect slurry or sludge from the surface of the land. Some of the petitioners have obtained right to collect slurry or sludge from the surface of the land by indentures executed by the State of Bihar and some of the petitioners purchase slurry or sludge from the settlees of the State of Bihar or from the raiyats. From the slurry of sludge, the petitioners manufacture briquete which is sold in the market. According to the petitioners, slurry, sludge and briqutters are not coal within the meaning of definition of coal in the Bihar Trade Articles (Licencees Unification) Order.1984 (the Unification order ). Consequently these are not essential commodities and neither Unification order nor the Bihar Essential Articles (Display of Price and Stock) Order, 1977 (the Display Order) has any application. In the writ petitions, the petitioners have also contended that they are governed by the colliery Control Orders 1945 and Unification Order and Display order shall have no application to them. So far the Colliery Control Order is concerned, it applies to colliery which includes plants for manufacturing coke. Since the specific case of the petitioners is that they manufacture briquettes, it can straightaway be held that Coillery Control Order has no application so far slurry or manufacture of briquettes are concerned. 3. The question that requires to be decided is whether slurry, sludge or briquettes is coal within the definition of coal as given in Unification Order. Coal in Unification Order means "coal coke and other derivatives and includes soft coke, hard coke of various grades". 4. There is no dispute between the parties that slurry is creation of (Industrial affluent consisting of mud, ash, oliy substances, water, and carbonacious ingredients. Coal in Unification Order means "coal coke and other derivatives and includes soft coke, hard coke of various grades". 4. There is no dispute between the parties that slurry is creation of (Industrial affluent consisting of mud, ash, oliy substances, water, and carbonacious ingredients. In the definition of coal in the Unification Order not only coal and coke but also other derivatives of coal are also coal within the meaning the unification Order. With reference to that definition it was urged by the learned government Pleader No. I that as slurry is derived from coal, it comes within the mischief of the Unification Order and Display Order. According to Mr. Sinha, learned Counsel for the Petitioners, although slurry is obtained after washing of coal, it cannot be said to be a derivative of coal. The short question, therefore, is whether slurry can be held to be a derivative of coal. The word derivative has not been defined in the Unification Order. "derivative" according to Blacks law Dictionary means "coming from another ; taken from something preceding ; secondary that which has not its origin in itself, but owes its existence to something foregoing ; anything obtained or reduced from another". Therefore, if it is held that slurry is obtained from coal then only it can be said that it is derivative of coal and shall be coal within the meaning of the definition of the Unification order. 5. A Full Bench of this Court in CWJC No.1530 of 1983 (R) and analogous cases (disposed of on 28th December, 1985) dealt in detail the process by which slurry is formed. It is, therefore, not necessary to go into those details for the purposes of these cases and it will suffice to notice relevant paragraphs of that judgment. While noticing how slurry is created, the Full Bench held in paragraph 6 :- "inevitably what first calls for pointed notice is the larger process which leads to the creation of the Industrial affluent of slurry. This may be noticed in non-technical language from the virtually admitted pleadings of the parties. In coal washery the raw coal mineral from the colliery is first brought and broken into graded place and thereafter undergoes a wide variety of processes with the principal object of reducing its ash content to the minimum. This may be noticed in non-technical language from the virtually admitted pleadings of the parties. In coal washery the raw coal mineral from the colliery is first brought and broken into graded place and thereafter undergoes a wide variety of processes with the principal object of reducing its ash content to the minimum. In the West Bokaro coal Washery this Chemical process, on the petitioners own showing, is what is called the croath floatation process", This inter alia involves that the graded coal is mixed with the diesel oil, pine oil and many other chemical ingredients and is thereafter washed with lacs of gallons of water. The end product is the washed coal with minimal reduced quantity of ash content tit for high graded matellurgical process including the manufacture of steel". In paragraph-7 it held that :- "the residual waste of the aforesaid process constituted of water, mud, oily and chemical substances, fine particles of coal and carbonacious materials, is commonly called slurry, is then put into a series of slurry pumps within the colliery premises" evertheless the surpolus waste in the form of sludge or slurry is thereafter disccharged as an affluent from the washery into the Bokaro river. Depending upon the weather conditions and where the river is not in high flood or otherwise this slurry would get deposited in the dry bed of the river or is then carried down on to the land of raiyati owners down steam, when the sludge or slurry comes into contact with the send or solid. The water content or other material gets soaked and absorbed in the same, leaving on the top a fine corbonaceous product or film on the soil. ", In these cases, the parties did not contend that coal is washed by a process other than that noticed by the Full Bench. They also did not dispute that the end product is washed coal and the residual waste is called slurry. 6. It will thus appear that the industrial effluent which comes out of coal washery during the process of washing coal consisting of water, mud, oily and, chemical substances, fine particles of coal and carbonaceous materials in commonly called slurry, But this is not collected for the purpose of converting into briquettes. 6. It will thus appear that the industrial effluent which comes out of coal washery during the process of washing coal consisting of water, mud, oily and, chemical substances, fine particles of coal and carbonaceous materials in commonly called slurry, But this is not collected for the purpose of converting into briquettes. What is collected has also been stated in paragraph 7 of the judgment quoted above, and that is the fine carbonaceous product or film on the soil which remains after water contents and/or other materials get soaked and absorbed in the land or dry bed of river. Relevant portion of paragraph 11 of the judgment can also be gainfully quoted :- - "in order to truely appreciate the rival arguments, it necessary to forcus on the true nature and the essence of the product commonly known as slurry. As a matter of history, it is not in dispute that in the earlier decades slurry had been allowed to go waste and was a pollutant which had to be painstakingly thrown in the rivers or stream in order to be washed away. It is common ground that some of the old coal washerries go back to the forties and fitees (indeed, it is the petitioners claim that one of the coal washeries in the present case is the oldest in the country, when slurry had no commercial value and was a mere polluting waste or a reject material. Undoubtedly, ml;. tion and abnormal rise in the prices of coal and fuel have rendered slurry deposit to be of substantial commercial value, for which rival claims are now being raised This by itself, however, cannot alter the basic nature of slurry as an industrial efluent on or an industrial waste. It, thus, seems plain that the true nature of slurry is that it is a residue, reject or waste of an industria process consisting of mud, each oily substances, water and carbonaceous ingredients" . That Using the position, it will be absured to hold that slurry is a derivative of coal As slurry is not coal or lerivative of coal, it is not covered by the defintion of coal under the Unification Order. Slurry has also not been enumerated as a trade article in schedule I of the Unification order, it must, therefore, be held that Unification Order does not apply to slurry. Slurry has also not been enumerated as a trade article in schedule I of the Unification order, it must, therefore, be held that Unification Order does not apply to slurry. 7 Coal has not been defined in Display Order. But in schedule I to that order, trade article mentioned is "coal including soft coke". Surely slurry is not coal nor it is soft coke. Display Order, therefore, shall also have no application to th business in slurry. 8. The validity of the Unification Order and the Display Order was also challenged by the petitioners on the ground that the state government was not competent to pass the orders. In the circumstances of these cases and the findings recorded above, that question need not be gone into. 9. In the result, all the writ petitions are allowed, let a writ of prohibition be issued prohibiting the respondents, their men, agents, servants, officers and subordinates from applying the provisions of the Unification Order and Display order, so far the business of the petitioners in slurry is concerned. There shall be no order as to costs. Petitions allowed.