A boat shall not receive help from any outside source, except

(a) help as provided for in rule 1;

(b) help for an ill or injured crew member;

(c) after a collision, help from the crew of the other boat to get clear;

(d) help in the form of information freely available to all boats;

(e) unsolicited information from a disinterested source, which may be another boat in the same race.