5 (2) An entry shall forthwith be made in the Coin Register and signed by at least two Currency Officers showing the date and nature of each such transaction, the number of coins of each denomination and the total value of the coins involved and the number of coins of each denomination and total value of coins remaining unissued. 9. Stock Book. (1) The Board shall cause a Stock Book to be kept at each Centre and Sub-Centre showing the date and nature of each transaction, the quantity in each denomination of coins deposited or withdrawn from a vault provided for under regulation 5 of these Regulations and the total value of each deposit or withdrawal. (2) The Stock Book shall be kept in a strong fire-proof vault or safe, and each entry therein shall be signed— (a) where the vault in which the coin is kept is provided by the Board, by every Currency Officer authorised to hold a key or combination of the vault in | which the coin is kept; and (b) where the vault in which the coin is kept is provided by an Agent Bank, by a Currency Officer. 10. Board of Survey. (1) There shall be a Board of Survey appointed by the Governor which shall consist of at least two persons, neither of whom shall be a member of the Board or a Currency Officer, whose duty it shall be to examine the stocks of coins held in any vault provided by the Board, whether unissued or awaiting re-issue or shipment to the Crown Agents, as the case may be. (2) The Principal Auditor shall be notified of every survey to be held and shall be entitled to be present, either in person or by his officers, at any survey. - (3) Ordinary surveys shall be held at least quarterly, and in addition at least one surprise survey shall -be held every year. ‘The Governor may order a surprise survey at any time. (4) At any survey the Board of Survey may accept, without counting the contents thereof, if the seals are apparently intact— (i) any sealed package that bears the seal of — (a) the Principal: Auditor and at least one member of his staff; or wh