Here are a few passages from the IMM/White Star Line rule book that speak to "spirits" and the crew:
3. Company Affairs Confidential; Trading and Smuggling-- (c) No wines, spirits, or liquors of any description are to be brought on board by Officers or any member of the Crew. A search for same must be made by the heads of the respective departments as soon as possible after the ship leaves port, and any found must be confiscated and thrown overboard, and the proprietors of same logged.
4. Sales of Wines and Spirits to Crew.--Except with the special authority of the Management, no sale of wines or spirits for cash is to be made to any member of the ship's company...
-- David G. Brown