6.—(1) A registrar shall not register a birth or death which has already been registered except–
(a)in accordance with Regulation 36, 45 or 47(4); or
(b)where the Registrar General gives his authority.
(2) Where it appears to a registrar that a birth or death has nevertheless been registered more than once–
(a)if there is no material difference in the particulars recorded, he shall write in the margin of every entry but the original the words “Inadvertently re-registered. For correct entry see No ... ... ... ...Register No ... ... ... ...”, inserting the number of the original entry and the number of the register in which it is recorded;
(b)if there is any material difference, he shall report the matter to the Registrar General and shall make such note in the margins of all or any of the entries as the Registrar General may authorise.
(3) Where a birth or death is re-registered on the authority of the Registrar General, the registrar making the new entry and the registrar or superintendent registrar having custody of the register in which the original entry was made shall make such notes, if any, in the margin of the respective entries as the Registrar General may authorise.