As a general rule whatever is deemed necessary in order to enable people to give proper attention to their duties may be taken at the collation. Moreover, since custom first introduced the collation, the usage of each country must be considered in determining the quality of viands permitted thereat. In some places eggs, milk, butter, cheese and fish are prohibited, while bread, cake, fruit, herbs and vegetables are allowed. In other places, milk, eggs, cheese, butter and fish are permitted, owing either to custom or to Indult.