Artikel 4

1. National legislation concerning employment injury benefits shall protect all employees, including apprentices, in the public and private sectors, including co-operatives, and, in respect of the death of the breadwinner, prescribed categories of beneficiaries.
2. Any Member may make such exceptions as it deems necessary in respect of
(a) persons whose employment is of a casual nature and who are employed otherwise than for the purpose of the employer's trade or business;
(b) out-workers;
(c) members of the employer's family living in his house, in respect of their work for him;
(d) other categories of employees, which shall not exceed in number 10 per cent. of all employees other than those excluded under clauses (a) to (c).