9. It appears from the letter of clearance dated 12.01.1996 that the State Government was within its right to put any other conditions over and above the conditions which were imposed by the Government of India, Ministry of Environment and Forest. The petitioner has not filed before this Court, the letter issued by the respondents raising the initial demand and therefore this Court is not in a position to ascertain as to what was the condition imposed by the State Government while raising the demand upon the petitioner. The respondents have taken a stand in the counter-affidavit that the demand was ad hoc, but respondents have also not filed the letter by which demand was issued by the State Government to the petitioner. The letters raising initial demand, both for the year 1996 and 1984 are not on record. In absence of the letters which was issued by the respondents to the petitioner, it is not possible for this Court to find out the conditions which were imposed by the State Government while issuing follow up letter pursuant to the letters of clearance issued by the Union of India, particularly, the fact as to whether the demand raised was full and final or it was ad hoc