19. Registration.- (1) No person liable to pay tax under section 3 or section 4, as the case may be, of this Act shall sell or purchase goods unless he has obtained and is in possession of a valid certificate of registration. Provided that any dealer not liable to pay tax under this Act may also apply for grant of a certificate of registration. (2) Every person, referred to in sub-section (1), shall apply for the grant of certificate of registration to the prescribed authority in the prescribed manner and the prescribed authority, shall, after verifying that the application has been duly filled in, grant certificate of registration in the manner as may be prescribed: Provided that dealers registered under the Bihar Finance Act, 1981, as it stood before its repeal by section 94, shall be deemed to be dealers registered under this Act and such dealers shall be granted a certificate of registration within such time and in the manner as may be prescribed and such dealers may sell or purchase goods till such time as the certificate of registration is granted to them. Provided further that a dealer, who exclusively sells or purchases goods mentioned in Schedule-I, shall not be liable for registration. (3) Every dealer registered under sub-section (1) of section 7 of the Central Sales Tax Act, 1956, shall apply for and obtain a certificate of registration, notwithstanding whether such dealer is liable to pay tax under this Act. (4) Where the prescribed authority, at any time after the grant of the certificate of registration, is satisfied upon an inquiry, that the particulars mentioned in the application are incorrect or the applicant has suppressed or misrepresented certain material facts, he shall, after giving the applicant an opportunity of being heard, and after recording reasons therefor, cancel, the registration certificate granted to him. | 