(1)No person other than,-(a)the State Government; or(b)the officers of the State Government not below the rank of a [Deputy Conservator of Forest], authorised in writing in this behalf,shall purchase or transport any blackwood or bite tree (Dalbergia Latifolia) or timber thereof:Provided that the purchase of any such tree or timber from the State Government or the aforesaid officers shall not be deemed to be a purchase in contravention of the provisions of this sub-section:Provided further that the State Government may by order exempt any such tree or timber below such measurements as may be specified by it from time to time from the provisions of sub-section (1).