The short version
- MLC 2006 guidance sets a chest inspection interval of not more than 12 months, and the inspection checks labelling, expiry dates and storage of every medicine[1].
- The ILO’s own explanatory note uses the medicine chest as its example: carrying a chest “means something more than simply having” one aboard[1].
- Flag rules differ on disposal. The Marshall Islands wants expired medicines returned to the supplier or a shore contractor; the Bahamas allows incinerating expired narcotics only under set conditions[2][3].
- For a US DEA program, expired controlled substances leave by one of four routes in 21 CFR 1317.05(a), and the records are kept at least 2 years[4][5].
An expired medicine is an inspection finding, not a housekeeping note
Standard A4.1(4)(a) of the Maritime Labour Convention requires every ship to carry a medicine chest, medical equipment and a medical guide, “subject to regular inspection by the competent authority”[1]. Guideline B4.1.1(4) fills in what that inspection covers.
What Guideline B4.1.1(4) asks for[1]
The chest, its contents, the equipment and the medical guide are maintained and inspected at intervals not exceeding 12 months by persons designated by the competent authority. They check the labelling, expiry dates and conditions of storage of all medicines and the directions for use, and confirm the equipment works.
Guidelines are not binding on their own. The convention’s explanatory note says port State control inspects the Articles, Regulations and Part A Standards, and a flag may use different arrangements if they still ensure proper storage, use and maintenance of the chest contents[1]. In practice, B4.1.1(4) is the benchmark an inspector measures against. The US has not ratified MLC 2006; it reaches US ships trading to ratifying ports, not US law.
What the full inspection covers is in the MLC medicine chest inspection checklist. This guide covers the part that fails most: dates.
How the rules on expired stock differ by flag and by law
| Source | Inspection or supply rule | Expired stock |
|---|---|---|
| MLC 2006, Guideline B4.1.1(4) | Inspection at most every 12 months[1] | Expiry dates checked at inspection[1] |
| Marshall Islands, MN 7-042-1 | Chest inspected at intervals not exceeding 12 months; record kept aboard[2] | Return to supplier or approved shore contractor; incineration at sea by authorised personnel as a fallback, with records[2] |
| Bahamas Maritime Authority | Company procedure in the safety management system[3] | Narcotics may be incinerated if no port reception is available, after a company safety and environmental assessment[3] |
| US-flag, foreign voyage | Medicine chest required; $500 civil penalty on owner and master[7] | No federal contents or expiry schedule; FDA has never recommended a procedure[8] |
| US fishing vessel | Chest suited to the number aboard, readily accessible[9] | No federal expiry schedule in the rule[9] |
The pattern: foreign flags write the expiry rule down, the US leaves it to the operator. For the US flag detail, see 46 U.S.C. 11102, the medicine chest law, and for flag-by-flag contents, ship medicine chest requirements by flag state.
What to do with an expired medicine depends on what it is
| Item | Route | Record |
|---|---|---|
| Non-controlled medicines | Back to the supplier or to a shore contractor (RMI practice)[2] | Chest log entry with item, quantity, date |
| Controlled substances, RMI flag | Destruction from unpacking to final step witnessed by at least two persons[2] | Controlled Drugs Register[2] |
| Narcotics, Bahamas flag | Incineration only if no reception facility, after assessment[3] | Master’s statement and Garbage Record Book: type, quantity, manner[3] |
| Controlled substances, US DEA program | On-site destruction, reverse distributor, return or recall, or DEA Form 41 to the Special Agent in Charge, per 21 CFR 1317.05(a)[4] | Registrant records at least 2 years[5] |
Do not borrow a foreign flag’s allowance
Chest controlled substances held under 21 CFR 1301.25 may be distributed only under the medical officer’s supervision, except in accordance with part 1317[6]. A flag notice permitting incineration is not a DEA disposal route. Walk the options in controlled substance disposal on a vessel before any expired Schedule II item leaves the locker.
Sharps and contaminated dressings follow a different path again: see vessel medical waste and sharps disposal.
An expiry calendar that survives a 12-month inspection
A chest checked once a year can hold expired stock for up to 12 months between checks[1]. The fix is arithmetic, not effort. This is a working method, not a rule.
- Date every line. Log item, lot, quantity and expiry, including the controlled stock register[1][5].
- Set the replace window. At each inspection, replace anything expiring before the next one: at a 12-month interval, anything inside 12 months[1].
- Add the voyage. If the next resupply port is further away than the next inspection, extend the window to the resupply date.
- Order once. One consolidated order per window, not item-by-item top-ups.
- Dispose by category, using the table above, and log it[2][4].
- Sign it. The flag or the competent authority designates who inspects[1][2]; record their name and date.
The step-by-step build is in how to stock a ship medicine chest.
How wide the replace window should be, worked out
The window is the gap between today and the next time someone can fix the chest. Take the longer of the next inspection date and the next resupply port. The rows below are worked examples of the step 2 and step 3 method, not regulatory figures.
| Trading pattern (example) | Next inspection | Next resupply | Replace anything expiring within |
|---|---|---|---|
| Coastal, home port weekly | 12 months[1] | 7 days | 12 months, at inspection |
| Deep sea, 4-month rotation | 12 months[1] | Uncertain port calls | 12 months plus one rotation, so 16 months |
| Fishing, 6-month season away | No federal schedule[9] | End of season | 6 months minimum before sailing |
The same inspection also checks labelling and storage conditions, not only dates[1]. The Marshall Islands adds that all medicines and medical devices except first aid kits are kept under lock and key[2]. A medicine stored above its label temperature in an engine-room locker can fail before its printed date: record where each item is kept, not only when it expires.
Discovery Health MD runs this calendar for fleets. Ship medical chest management covers dating, the replace window and resupply; controlled substances management covers the expired Schedule II to V route under part 1317; and maritime medical consulting covers flag-specific procedures. Send us your chest inventory and we will mark what expires before your next inspection.
Common questions
How often must a ship’s medicine chest be inspected?
MLC Guideline B4.1.1(4) sets intervals not exceeding 12 months[1]. The Marshall Islands applies the same 12-month limit[2]. See the vessel medical compliance audit.
Is carrying expired medicine a deficiency?
The MLC inspection checks expiry dates of all medicines[1], and the ILO note says carrying a chest means more than having one aboard[1]. Expect an expired item to be written up.
How should a ship dispose of expired medicines?
Under the Marshall Islands notice, return them to the supplier or an approved shore contractor, with incineration at sea as a recorded fallback[2]. Controlled substances follow stricter routes set by the flag or by DEA.
Can expired narcotics be incinerated on board?
Some flags allow it. The Bahamas permits it when no port reception is available, after a company assessment, with Garbage Record Book entries[3]. A US DEA program uses the part 1317 routes[4][6].
How are expired controlled substances disposed of on a US program?
Four routes: on-site destruction, a reverse distributor, return or recall, or a DEA Form 41 request to the Special Agent in Charge[4]. See the DEA inspection checklist.
Does US law set an expiry schedule for ship medicine chests?
No. 46 U.S.C. 11102 requires the chest on covered voyages[7], and FDA says it has never recommended a particular procedure for supplying ships’ chests[8].
How long must controlled substance records be kept?
At least 2 years from the date of the inventory or record, available to DEA for inspection[5]. See controlled substances recordkeeping on a vessel.
