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.