Oh well, I'm sure we'll get more than one conflicting reading of the San Remo Manual:
Here's one!
Note, I am only quoting the exact wording from the document, and highlighting one sub-section. Make of it what you will:
you copied sub-section 47.
47. The following classes of enemy vessels are exempt from attack:
(a) hospital ships;
(b) small craft used for coastal rescue operations and other medical transports;
(c) vessels granted safe conduct by agreement between the belligerent parties including:
(i) cartel vessels, e.g., vessels designated for and engaged in the transport of prisoners of war;
(ii) vessels engaged in humanitarian missions, including vessels carrying supplies indispensable to the survival of the civilian population, and vessels engaged in relief actions and rescue operations;
(d) vessels engaged in transporting cultural property under special protection;
(e) passenger vessels when engaged only in carrying civilian passengers;
(f) vessels charged with religious, non-military scientifc or philanthropic missions, vessels collecting scientific data of likely military applications are not protected;
(g) small coastal fishing vessels and small boats engaged in local coastal trade, but they are subject to the regulations of a belligerent naval commander operating in the area and to inspection;
(h) vessels designated or adapted exclusively for responding to pollution incidents in the marine environment;
(i) vessels which have surrendered;
(j) life rafts and life boats.
here the NEXT sub-section:
Conditions of exemption
48. Vessels listed in paragraph 47 are exempt from attack only if they:
(a) are innocently employed in their normal role;
(b) submit to identification and inspection when required; and
(c) do not intentionally hamper the movement of combatants and obey orders to stop or move out of the way when required.
For those questioning which section of San Remo I cite, try "103. If the civilian population of the blockaded territory is inadequately provided with food and other objects essential for its survival, the blockading party must provide for free passage of such foodstuffs and other essential supplies, subject to:"
You're missing half of sub-section 103.
If the civilian population of the blockaded territory is inadequately provided with food and other objects essential for its survival, the blockading party must provide for free passage of such foodstuffs and other essential supplies, subject to:
(a) the right to prescribe the technical arrangements, including search, under which such passage is permitted; and
(b) the condition that the distribution of such supplies shall be made under the local supervision of a Protecting Power or a humanitarian organization which offers guarantees of impartiality, such as the International Committee of the Red Cross.