The most effective communication method will vary from company to
company and depends on the company culture. For example, in some companies,
a newsgroup that people choose to subscribe to, whereby they can
quickly scan the subjects of the messages for relevance, may be the most
effective tool. However, other companies may not use newsgroups, so email
may work more effectively. For significant changes, we recommend that you
send a message out to people (“push”) rather than require your customers to
check a certain web page every couple of days (“pull”). A significant change
is one that is either sensitive or major, as defined in Section 17.1.3.