Companies are not generally required to interpret the impact of external political, economic and social developments on their affairs. However, if an external development will have or has had a direct effect on the business and affairs of a company that is both material and uncharacteristic of the effect generally experienced by other companies engaged in the same business or industry, the company is urged to explain, where practical, the particular impact on them. For example, a change in government policy that affects most companies in a particular industry does not require an announcement, but if it affects only one or a few companies in a material way, such companies should make an announcement.