(2)Catching and killing, by any method, of fish for any purpose whatsoever including consumption and selling of under sized fish of the following species, namely : Rahu, Catla (Bahu), Mrigal, Chitai, Kharia, Pithia (Mahasul), Gharia below 23 c.m. in length and Mali (Clabasu), Gonius, Kurhil, Bhagum below 10 c.m. in length is prohibited between the first day of August and thirty-first day of October :Provided that the above restrictions may be relaxed by the order of the Director of Fisheries in writing for pisciculture purposes only.